Indeed, one of the fundamental principles of freedom is property ownership. That means you aren't allowed to destroy other people's property with booby-traps without being punished.
If you don't like it, live in a place without property ownership rights.
The correct answer to laws you don't like is to change the law, not engage in criminal acts. Of course they believe they can act lawlessly - people like you do so all the time, so it must be OK.