[k-krack]

You can hardly call it "ripped off," dude.
Let's be serious, if you were playing a show (especially one in a state that AT YR WORD they haven't played before, or at least in many years) and someone shot something at you, you'd be pretty irked. There are many ways of taking this. Of course, there are the tolerant bands (unfortunately, these are rare) that take it in stride, ie. chuck the shoe back in the audience/eat the shoe/Take a piss in the shoe and shoot it back, WHATEVER! Anything to please! But then there is the majority of bands that get pissed of at hecklers. Of course it's a bit rash that they wouldn't come back for an encore or whatever, but whatever. You deal with it, you still got a 70 minute set, which is still a pretty decent set.