Lol, well, I realize that this is a serious issue, but when someone tries to pull a stunt like that on me I can't help but to laugh at them. Usually it's a simple matter of telling them to grow up... then even they are embarrased about their slip-up.
And quite frankly, the entire "you're not a sub, you're a Domme in sub's clothing" thing... most of these guys I would rather Domme any day then actually submit to. I could probably teach them a thing or two, lol :-)