As soon as you start trusting a vandalism detector over manual monitoring a lot of stuff will start to slip through, gets through the news, then the detector won't be trusted any longer. It will have a short life but will be interesting to watch.
Sew m@ny things that can bee done to bypass mechanisms. Even simple euphemisms like cleaning the old rifle http://images.clipartof.com/small/5039-Man-Cleaning-Inside-The-Barrel-Of-His-Unloaded-Rifle-Gun-Clipart.jpg
"If you lived today as if it were your last, you'd buy up a box of rockets and fire them all off, wouldn't you?" -- Garrison Keillor