Don't go into an Iraqi mosque wearing nothing but an american flag as a cape, with 'My second home is next to where I torture your brother in Guantanamo Bay' written across your chest and singing a rude song about how burkas only mean you can only be bothered to stick it in the eye socket.
Unless that is you're Mr T, in which case you could probably get away with that, although if you were Mr T, you probably wouldn't have got on no damn plane, fool, in the first place.