Wolf – I’m really not interested in being quoted on your blog. Presumably, if causing him to receive a ticket is mesirah, you would not be allowed to do so. You would have to find another way to protect your private property. I would suggest that it is possible to find another way.
ames, we are supposed to have law and order, but we are not supposed to give over a Jew to be punished by the authorities. We can either enforce order with whatever punishment we are able to give or we can try to persuade. Not informing does not mean that the authorities won’t catch and punish the offender on their own.