We already tried that. The problem is that that approach relies on a static answer. As soon as the spammers realize that their bot is failing, they go the website and do one manual account registration to get the magic string, then update their bot software.
I have many questions/answers and they rotate automatically. This is a standard feature of the "random question." I also instruct users to copy and paste the question into the answer box. The question IS the answer! No way they can get a bot to do that. Never had a problem with spam.
The questions are always long, encouraging humans to copy/paste instead of trying to type it. I have them all essentially the same, just each one worded a little differently. Example:
"If you're human you'll have no trouble with the following - Copy and paste this entire paragraph into the answer box below, then complete your registration. If for some reason you cannot copy/paste, you'll have to re-type this all word for word, into the box below. But surely you CAN copy/paste, right? HUMANS ONLY."
04-01-2011, 12:24 PM
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