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Anonymous Posting Returns, I Hope | 35 comments (35 topical) | Post A Comment
One small request...[ Reply to This ] (none / 0) (#1)
by AnonymousUser on Mon May 14, 2007 at 11:28:01 AM PDT

Could you tweak the comment routine to require a question only for anonymous users? Otherwise, there's no benefit to registering on this site.

Also, why did you choose this multiple-choice method instead of the more standard "captcha" text boxes? With, say, 6 answers to choose from, 16% of the spam postings will still get through using a relatively simple script to analyze the page and select one answer at random. With thousands of attempts, a significant number will get through.

Bob

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Re: One small request...[ Parent | Reply to This ] (none / 0) (#2)
by Ed Foster on Mon May 14, 2007 at 03:25:35 PM PDT

We definitely will work on making improvements to this sytem. We've been struggling for months to find a captcha that would work with our weblog engine, and this was the first approach we found that could be implemented without requiring a lot of other changes to the site. -- Ed

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Good luck[ Parent | Reply to This ] (none / 0) (#3)
by tcsbiz on Mon May 14, 2007 at 07:08:45 PM PDT

Ed, I wish you the best of luck in bringing back anonymous posting. I haven't seen this sort of captcha. It's normally a series of skewed characters that have to be entered. But this may work.

It's true that the volume of posts on the site have been diminished, but, I think the quality of the posts has been better without any of the childish rants or comments directed at another poster. I liked the civility of it.

Tom.

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mac video soft[ Parent | Reply to This ] (none / 0) (#38)
by Anonymous User on Mon Sep 01, 2008 at 05:41:27 AM PDT

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new system[ Parent | Reply to This ] (none / 0) (#5)
by Reziac on Tue May 15, 2007 at 10:32:48 AM PDT

As one person pointed out, the challenge is probably not needed for logged-in posters. If you don't feel that it can be dropped entirely for the logged-in types, you might implement a "known-good user" list for regulars. This might be automated by parsing for interactive posting patterns, or something like.

As to the new text-challenge, I far prefer this to the evil image-captcha. Text is far more friendly to the blind, AND to folk who don't load images (due to a slow connection or by preference). The only problem I can see is that it really presumes one is a native English speaker with a pretty fair vocabulary. Still, this is better than presuming one has both perfect vision and good visual-noise-parsing skills, as is the case with the image-captchas.

.
~REZ~
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Google is your friend[ Parent | Reply to This ] (none / 0) (#10)
by Anonymous User on Wed May 16, 2007 at 11:28:00 AM PDT

Any trickier captchas can be solved with the aid of Google -- this ain't no high school closed-book exam!

FWIW I haven't seen any yet that gave me trouble.

Registering should (if it doesn't already) also require one, but registered users could stand not to get one (at least after N postings, for some suitable choice of N, none of which were later deleted as spam; this might even also be applied to anons with a stable IP address).

I note that all the form pages use the POST method of submission, which means you can also safely reject any posting attempts that arrive as GET www-form-url-encoded requests as being automated. That one simple criterion often weeds out 90% of the spam submissions or robo registration attempts at forum sites, and may catch bots that actually manage to defeat the captcha.

Make sure the repertoire of questions is enormous, so it's unlikely some bot maker will compile an exhaustive list of the questions and correct answers and program them into a bot. Add new ones from time to time, and retire old ones.

And please either make "Auto Format" the default format or save the last-used format in a cookie, so you only need to change it when you want to change it instead of with every post?

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Auto Format[ Parent | Reply to This ] (none / 0) (#19)
by Anonymous User on Sat May 26, 2007 at 09:14:50 AM PDT

Thanks

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yes[ Parent | Reply to This ] (none / 0) (#36)
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ReCAPTCHA[ Parent | Reply to This ] (none / 0) (#18)
by AnonymousUser on Fri May 25, 2007 at 09:25:12 AM PDT

Ed,

I came across the following article in TG Daily:

http://www.tgdaily.com/content/view/32194/118/

Carnegie-Mellon students are using OCR-unrecognizable words found during their Internet book scanning initiative as CAPTCHA phrases used by websites.

I propose that you switch over to this new and decided more useful method of verifying anonymous users.

Bob

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Unverifiable[ Parent | Reply to This ] (none / 0) (#20)
by Anonymous User on Sat May 26, 2007 at 09:17:25 AM PDT

These "captchas" can't be machine-verified though, can they? So a spammer could have their bot submit any old response, and they'd be able to spam, and at the same time they'd pollute the results of the text scanning with nonsense.

Unless the captcha submission is vetted by a human, but then it kind of defeats the whole idea. That human could just directly aid the scanning project instead, and it would take ages between submitting your posting with the captcha and the posting being accepted, during which time you need to keep a copy in case something goes wrong and you need to retry, or risk losing data.

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Answer from recaptcha.net[ Parent | Reply to This ] (none / 0) (#22)
by AnonymousUser on Thu May 31, 2007 at 11:13:18 AM PDT

But if a computer can't read such a CAPTCHA, how does the system know the correct answer to the puzzle? Here's how: Each new word that cannot be read correctly by OCR is given to a user in conjunction with another word for which the answer is already known. The user is then asked to read both words. If they solve the one for which the answer is known, the system assumes their answer is correct for the new one. The system then gives the new image to a number of other people to determine, with higher confidence, whether the original answer was correct.

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sssss[ Parent | Reply to This ] (none / 0) (#37)
by Anonymous User on Fri Aug 15, 2008 at 09:03:47 AM PDT

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Anonymous Posting Returns, I Hope | 35 comments (35 topical) | Post A Comment
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