Yeah, I added a registration question to my tankadin.com forum...
"Answer this question... Tank + Paladin = ?"
Legitimate people trying to register for my forums should be able to figure out the answer.
Bots and non-english speaking Chinese and Russian spammers... not so much.
Once I added the question, the spam registrations dropped just a few per month.
The biggest issue I see is people registering and creating profiles that contain links to other websites in an attempt to cheat at Google. I don't mind if people have a link in their signature that points at their own personal website. However, I HATE when people register and never make a single legitimate post, but mooch off my site to get backlinks.
Once a month or so, I run a query though my forum user profiles looking for questionable links. When I find them, I delete accounts and ban them.
I get a remarkable amount of back-link spam from lawyers, jewelers, motorcycles, golf, breast implants, etc... Most of the sites appear to be legitimate sites that must have paid for search engine "optimization" from shady outfits.
In a related note, have you seen the JC Penney Google smackdown?... http://www.google.com/search?q=jc+penney+google
GroovyMAME support forum on BYOAC
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