Newdigital,

If you are getting a lot of spam user registrations, I have dealt with this in my own private boards using phpbb. So far, I have not had any new unwanted spammer bots after I implements some simple changes to the code. If you do indeed have this problem, send me a PM, I can point you to the right codes to stop them.

Once they register, there is really no way to stop them from posting. So I take preventative action to stop them from registering. Then you can also implement another mod to prevent new users with less than x posts from posting urls. Anyways, good luck. I've been kicking back lately since there isn't any new bots to deal with.