Being moderated means that being the webmaster (Greg) you can set this BBS program to block certain things like aol.com. That has been where the "bob" and everyone like him posts have been coming from.
There are easy ways to find that info whether he posts his email or not. I ran the slotcardbbs for about 3 years before Greg took it over if any of you are wondering how I know this. It is a MAJOR pain in the butt to moderate, because for everyone like Dave who just ask why, you have a 100 people very angry at you....because they never did anything wrong. And you have to look in all the time to make sure the legit posts make it to the board in a timely manor.
Now the VERY SIMPLE solution to this is just DO NOT RESPOND to any of the ignorant posts made by these people because you just as Greg has said fuel the fire and create more of the same.
I can't tell you what a pain it became for me to run 1 BBS. Greg does if I am correct 4 right now, I can't tell you how hard that must be. So give the man a break IGNORE "bob" and use this board as it was meant to be used.