FTDK.
I agree with you that touching another person's aircraft is a serious offence, however, I think that if you're seriously having the need to threaten people on line then maybe you should look at the attitude of yourself towards others. That there is the attitude of most of the selfish pilots.
What makes you any different to the guy at the fuel bowsers ?
Airmanship is an unwritten gentlefolks agreement, and when someone else breaks that agreement, then it shouldn't change you. They will get found out for it and then you can let karma get the better of them.
Ease up gramps and maybe then alot of the other people in the industry wouldn't be so selfish. It's all about lead by example.