I've also been the victim of petty theft many times. My reaction has always been pretty much the same as yours...
I don't really put a whole lot of stock in material possessions though. Even when the iPod I spent my vacation money on was stolen out of my own bedroom, or the time somebody snagged $300 out of my pocket at a concert wasn't that big of a deal to me. I mean, i got angry. Of course I was angry, but there's really nothing to do about it and life will continue without [insert stolen possession here].
Now, if any of
these things were stolen from me, I'd go bat shit crazy, but even then I don't know how I'd get them back.