haters and dumb/smart asses come in waves. GG concerns also

[Valeria]

Then today some dumb ass young women saw me, were selling purses, and were like "Good afternoon sir, ma'am, sir... we are selling these purses...
I just said "Not interested" and they left.

In defense of these women, they were probably just confused as to how you wished to be addressed. You didn't describe how you were presenting at the time, but not everyone that presents androgynously wishes to be called "ma'am", and your description doesn't make it sound like they were deliberately being rude.

GG concerns -
I never understood why all the talk about women's self defense and all that. I always rudely dismissed it as "Oh gyod they are just being paranoid." But having been mistaken for a woman now and then [not that I pass real well but some still think..] I can understand why this feeling. Do GG's have to put up with this sh*t most of their lives, I mean with a-holes or creeps trying to follow them when they are out?

It really is a "G" concern, not a "GG" concern. They generally don't test you for a Y chromosome before behaving this way, so plenty of trans females get similar treatment. I have to walk several blocks downtown from the mass transit line to the university almost every day. It's a very well patroled area, with significant police presence most of the time, but it's not always pleasant (and I simply won't walk some places without an escort, especially after dark).