I agree, when I have lost bullet cameras it is because someone beat them to death with a stick or a 2x4. I've also had them cut the wire coming out of the bullet before, but only a couple of times as they usually cut it somewhere in the conduit run. Only once have I had cameras stolen, and I had emailed video loss alerts on them and cops there in 10 minutes but they were gone. Pulled them down and took them, and I think that was the only reason they came. They were 13 feet off the ground too. Lot of work for a couple $40 analog cameras...
I also had someone punch a vandal proof dome to death the other day. I hope he broke his hand. I have good video of him for 20 minutes before he noticed the dome. It was varifocal so the punching made it go out of focus mainly and the shot went to heck but he did crack the plexiglass too. Morons. He was arrested.