We have had spam problems with the SFX raw form too -- and it's a really
ugly form -- I wouldn't neccesarily recommend it. But it's pretty easy
to use (on the resolve menu page; it's not really easily accessible
anywhere else) if you want it. It pretty much just takes the comments
entered and sends them via email to a specified address -- so existing
email spam-handling technologies you have in place might then handle
spam, with all the pro's and con's of that approach.
But we can look up and explain how to do that if you want to, it's not
hard.
I guess otherwise, general anti-spam practices apply, with no magic
bullets. You could use a captcha (which has accessibility problems). You
could pay for the WordPress-affiliated Akismet anti-spam API (which will
require some development, and isn't foolproof).
You could use the really basic "answer htis simple question: what color
is the sky" type approach.
Some of our library tech peers have had success with simple techniques
along the lines of:
http://www.landauer.at/preventing-spam-in-form-submissions-without-using-a-captcha/
I'd ask on the code4lib listserv for other ideas you could implement
with custom programming.
Jonathan
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