I think what G the E is getting at is his concern for the obviously "aviation educated" damage that is taking place.
Your average pikey who wants to damage a plane would probably do something like kick the fuselage to bits or snap off the rudder.
When you've got someone putting single swipe cut marks in the prop you've got even more of a problem on your hands. I always worry myself silly that someone I have pissed off in the past might do something to my plane and emphatically check all my control cable connectors before flight extra well!!! I don't know why but these always seem so vulnerable to a nasty person with a little adjustable and some nimble fingers......
