Rather than use of profanity, my understanding is the primary difference between the Pit and the other forums is that personal attacks are allowed in the Pit.
The only attacks, and they are often rigorous, that one should expect in GD and IMHO are for posting unsupported controversial views. The folks in MPSIMS, IMHO, seem to me to be less likely to rock that boat in the first place.
I’ve never seen anyone on the SDMB admonished for non-gratuitous use of “curse words” in any forum. It may be a judgement call applied on a case-by-case basis. Based on comments I’ve read here, number of posts doesn’t seem to carry as much weight as one might think among the powers that be at the SDMB. Overall post quality and perhaps length of time as a member might carry more influence, at least in my imagination.