[Radiant] Commentable and Spam

[Sean Cribbs]

It's probably too early for many of you who are using the Comments behaviors
to get blog-spam, but I wanted to address the issue before it becomes a
problem.

One user, "Nolan", commented that CAPTCHA images are inaccessible (to
vision-impaired users) and should not be considered an option.  As an
alternative, he suggested the use of spam-filtering services like Akismet.
While this seems a very promising option, that would be a whole lot of extra
code (and perhaps another library, even a gem!) and probably outside the
scope of my little behaviors.

Instead I'd like to get your thoughts on another method, although there is
ample room for many methods down the road.  The method I'm considering is a
challenge-response where the challenge is in human-readable text (a method
suggested on some of the CAPTCHA pages I read).  I haven't worked out the
particulars, but it would go something like "Subtract twenty-five from the
sum of eighty and thirty-seven and enter the result as a number." The real
ones would probably be easier than that, of course.  This could be
automatically generated of course.  Another option is to say "Enter the
subject of the sentence 'Jane walked to school.'" or something of that sort.

Please give me your thoughts on this...

Cheers,

Sean Cribbs
seancribbs.com

P.S. updated comments behaviors at
http://seancribbs.com/svn/rails/plugins/comments_behaviors
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