The TOS allows the admins to demand the removal of "vulgar" language. 
LOL, Jump right into the pot......
I have seen stuff like this happen, too. You wonder why a company doesn't hire certain people, now you know why. The owner made a mistake in asking the guys to tone it down, either the girl could handle it, or she would leave. The 30-90 day grace period is there for that. The problem is being that "special one" everyone has to comply to, not in the guy/girl thing.
I have been in a couple of start ups too. I usually left and took my share of capitol with me as soon as the others could buy me out too when it became apparent the "Special One" rules were going to be intruding into a fun environment.
IN PUBLIC you stick with the formal form of the language. That was one of the rules I learned because in public you never know who you are dealing with. The formal form avoids those misunderstandings.
Use your own judgement if you are at home here or in public. Peoples response will tell if you made a good decision.