I guess you guys need to put more security on registering, I got an idea captcha that asks a question that is easy to answer should suffice like how many syllables are in bitcointalk? answer:
Something like this I seen before
I don't think that will solve anything; people will just register manually, then proceed to use the bots (probably like they do now).
And forcing captchas every time a user posts is out of the question.I do agree that a captcha system could be quite annoying, but what about setting it up for just newbies?
Indeed, such captcha system has been set up for PM for people with less than 10 posts (10 activity).
I mean, when people already need to wait for 6 minutes to make their post, they probably wouldn't mind filling an extra captcha...