I'm not sure what the solution is here - some forums put people in a 'probationary' state for a while where they either can't post or have extra scrutiny. There

I'm not sure what the solution is here - some forums put people in a 'probationary' state for a while where they either can't post or have extra scrutiny. There's some spoiling of the commons going on here that I can't quite put my finger on. Separately, why are companies using this? Surely this is counter productive to their marketing efforts? Or maybe am I wrong and any attention is good?