I don’t think the OP was being racist or trolling. I think he just wanted to make sure he wasn’t going to end up being perceived as a poseur and end up provoking someone because of it, like his example of someone provoking ire by wearing a Hell’s Angel shirt.
Even the Reverend Jackson knows there are places it’s dangerous to walk.
[Quote]
(Jesse Jackson - Wikiquote): There is nothing more painful to me at this stage in my life than to walk down the street and hear footsteps and start thinking about robbery. Then look around and see somebody white and feel relieved… After all we have been through. Just to think we can’t walk down our own streets, how humiliating.
It’s not a closely guarded secret and it’s not limited to black people but I’m throwing out the quote because it relates to this thread.
There is nothing irrational about being caught out in the wrong neighborhood. That situation comes in many flavors. It sounds like the op wants to know if that kind of situation can occur in public places where he may inadvertently come across a group of trouble makers. The answer is it depends on where you’re at and any other circumstances that would add to or subtract from the situation. An older white guy walking around with a sideways ball cap with the bill turned up and wearing saggy pants is probably going to garner derision from black kids. the same would apply in any combination to any group of kids.
You should know the rules very clearly by now, so I’m giving you a warning for accusing someone of being a troll outside of the Pit.
I really want to know what kind of car he drives!
Tell him he should look at the man in the mirror.
:::grabs his crotch and moon walks away:::
Just don’t wear anything named “FUBAR.” 
Or FUGU, unless you buy it from a qualified professional.
What do you think he meant when he asked if he would be “hurt or harmed”?
Probably meant his feelings. High school kids can be so mean. 
Not to mention the killer clown in the sewers.