Nothing. I have a Boston T-shirt; I wear it in New York all the time (everywhere I go, I buy a souvenir T-shirt).
Actually, I'm wearing it right now.
Maybe you might have some trouble if you wore a Red Sox hat to a Yankees sports bar in New York. But not a regular T-shirt or hat that just says, "Boston" or "Boston University" or something like that.
they wear stuff
They wear stuff
the same stuff you wear
your dog
they wear stuff i cant say
they wear stuff acroos them
stuff . . .
stuff
stupid stuff
they wear stuff like you and me do
Fans are required to wear clothes.
Brad Park wore number 22 for the Boston Bruins, he wore number 2 for the New York Rangers before he was traded to Boston for Phil Esposito however that number was retired by Boston after hall of famer Eddie Shore retired hence his wearing of number 22.