No but really, violence as retaliation is pretty overkill here. It doesn't serve as a deterrent, it doesn't do anything other than make you feel good about yourself and it certainly doesn't help the owner of that poor Panda. A better system of punishment and, if possible, reform of the criminal is more sensible. We may not understand why folks steal stuff and then destroy it, but they will have their own personal reasons. Address those reasons and you address the crime much better.
I don't condone the actions of the criminals at all and I don't have any amount of respect for them for doing what they have. I also don't condone violence as the first port of call as a response to such vandalism, even if "you don't mean it", that's just the same as when you ask one of these guys why they stole the car in the first place "I dunno, just felt like it".
So yeah. Sad times for Panda and van owner. Sad times that there will unlikely be any punishment or conviction meted out on those responsible. Sad times that insurance will likely pass the financial burden of this onto the victim. Sad times all round, but no call for threatening extreme violence and death. Keep your perspective, folks.