Most of the prohibited subjects are to protect the site from LE attention. The only ones I can think of are minors, drug use and speculation about someone having STDS. Of course outing anyone is prohibited for obvious reasons.
There's also links to websites with pornographic images, providers using sexual references in their ads, and the use of abusive or threatening language.
Thanks guys. All good stuff. Sorry for the runaround. What I was referring to and maybe it was my iPad but there was a lot of blackout on subject lines, titles etc making it damn near impossible to read some of the shit. It is all working properly now. You guys do a good job keeping this going smoothly.