Nippon,
You're complaint isn't based on them being transgender, your complaint is about their behavior.
It's really no different than the woman in the bar who the straight guy goes and hits on, and for whatever reason she rebuffs his advances (already has a boyfriend to isn't interested) and he continues to hit on her, even well after she has made it clear to him. At that point, the fact that he is heterosexual, as is she, has NOTHING to do with what followed after she rebuffed him. It's solely about his boorish behavior.
I've been hit on gay guys from time to time and when I informed them I was straight, the vast, vast majority of them took it in stride and moved on. I really can't think of but one or two who persisted and even then their friends stepped in, pulled them away and apologized on behalf of their drunken friend.
This isn't a gay/straight/transgender thing as much as it is people who don't know how to take no for an answer, or don't show the respect for others that they expect for themselves. When I bartended, I couldn't begin to count the number of guys I had to give the acceptable behavior warning speech or have thrown out of the bar for excessively trying to hook up with the female clientele after the woman had told them no.