I saw this story and wondered what was behind it. Behaviour like this is extraordinarily dangerous - a man who stole a snow plow a few years ago killed a Toronto police officer - but almost always is a result of mental derangement. The police have to be involved to capture the person involved but beyond that it's a medical and not a criminal issue:
"Mounties say a Surrey man will likely face several charges after a destructive weekend that included smashing a large stolen truck into six police cruisers and flooding a section of Burnaby Hospital by ripping the head from an emergencyroom fire sprinkler. Staff Sgt. Maj. John Buis said the man stole a large rental truck and, just after 1 a.m., drove it into six unoccupied cruisers parked outside a community policing station near Burnaby's Lougheed Mall."