Gizmo, people that make and run these bots rarely target one site. They make a universal script/bot that can spam as many websites as possible. If your site has a slight unique registration variation that causes the bot to fail, chances are slim to none the bot programmer will care enough to modify his bot for your unique exception. There is no need for the spammer to include a single website workaround in his bot when there are thousands of other vulnerable boards out there. Hell, make it a static picture of a monkey or apple or something and ask people "What is this a picture of?" before they can register. I'd like to see bots do DSP image recognition of objects
You can even be tricky and ask "What color is the text/object above" so regardless of what the captcha text reads or what the object is, it's the color that matters. Beating spammers is not hard, you just need some common sense.
Haveing said that, I wouldn't mind seeing some code of people implimenting some of my ideas.
