Just play people with high experience who don't have abnormally-high ratings. Or if you play newcomers, play one-pointers until they establish themselves.
FIBS was just fine for years without RepBot. I've played under assumed names on and off for years, and I've never been dropped. My rule was to never play anyone with under 1000 experience unless they entered an email address using the "address" command. It was a simple rule, but it worked spectacularly.
And hey, "FIBS sucks without..." doesn't exactly make me feel warm and fuzzy.

NEWCOMERS STAY OUT!!
We are very sorry, but Patti told us not to play against anyone with an experience less than 1000. We don't know if you are a good guy, so it is better to avoid you. Besides we are obliged to follow Patti's rules because otherwise we will get banned (ask the italians...). Some time ago there was a nice program telling people about your reputation, but it is gone and FIBS is a coterie now. MEMBERS ONLY! Please don't aks Patti anything about RepBot, because that is not her business, but don't hesitate to ask her why nobody is playing you! It's as simple as this: It is RepBot's fault, because everything is RepBot's fault. Nobody is playing you, because RepBot is offline. (Ah and don't aks Patty why RepBot is offline, it's now her business.)

Cheers,
Thomas