Well, I'm not checking when people are trying to post but when they try to register--sorry if I wasn't clear. The forum requires registration (and verification

Well, I'm not checking when people are trying to post but when they try to register--sorry if I wasn't clear. The forum requires registration (and verification) before posting, so once they're registered there aren't any restrictions. And one of the benefits of this check is that there aren't any "human verifications" visible to the user. In fact, I could probably do away with the email validation too.