A prank is a fake spider in your mailbox and MAYBE even a daytime ding-dong ditch (even that is stretching it). What you are experiencing is vandalism and harassment. I'd call the police non-emergency number (during the daytime, not when it is happening) and ask what they think you should do.
I also like the idea of speed-dialing the parents when it happens. The problem with that is that you don't know if the parents will care.
That's why at the same time the parents are being called, the spouse would be calling the cops as Junior DelinQuent scuttles away. If Mommy & Daddy Dearest don't care? Well, the cops *will*.
agnes!