If I feel like saying something, I usually do it via PM. I have a profile on my premium account with one picture, verifying that I am indeed the model in question, so if they doubt they can check that out. (I never have the money to tip x.x hopefully that will change)
Sometimes the girl loves it, if it's an ACF girl, I've always been made to feel welcome. I leave it up to the model if she wants to out me. When it's not an ACF girl, I check her profile. If she lists herself as straight, I don't say anything.
I have been banned upon entering a room before. Model's profile said straight, so I assumed it's cause I have a female prem name.