[Nyororin]

Good luck on legal action over covering a tattoo.

I am pretty amazed that it is posted as "gangsters". What sort of wording are they using, exactly? And where exactly is this?

Really, I doubt you`ll get anywhere at all as blocking tattoos is not racism, and tattoos are not protected by law. They`re looked on as a gang symbol fashion choice - not something that will get people up in arms about if blocked. Even if you are a resident of the town/city and pay taxes - you still have to follow the rules in public areas. One of the rules is to cover your tattoo.
Paying taxes doesn`t make you immune from that.