One shouldn't wear things that one cannot read...that would have been a bad thing.
I was thinking about selling a T-shirt in Russian that said, "F*** Russia. I'm an American and I can personally kick any of your a&&es. Come on. Try me right now."
I'd advertise that it said: "America loves Russia. We're glad the Cold War is over. Come over and shake my hand."
It would sell like hotcakes to tourists going to Russia.