It was like the racist guy who got exploded a couple of weeks ago. You need to ease your way into it before going full mask off.The acceptable level of retardation of any community should generally be held on a certain established level. A new member coming in and immideately trying to put themselves a few notches above that level can(and often does) lead to a bad precedent and overall retardation rising because of it.
In a civilised area (no blacks) just handing over your ID and calling them back to pay later is the standard procedure. Unless the shopkeeper is Jewish of course.I think if you stiff someone on a bill the cops fine you and the provider can put a lean on you but usually they don't.
I was actually somewhere today getting food, their credit system was down and they asked if I was in a rush. If I didn't have cash I'm guessing they'd let me leave without paying but I happened to have some cash on me to make things easy.