take up crossbows as a hobby and start practicing on some cans in front of the house... betcha the kid won't be by anymore...

anyone has a problem, stare at them with a look that says what you're thinking and tell them to get off your property...

works for me, except i play with torches in front of my garage in front of the thugs around here ... would be a shame if i had to use it on something other than burning out old bushings...
just don't leave the car outside unattended... my car got egged first night i left it out... lucky for them i had my camera off.

but seriously ... don't let it get to you this is the real world ... sounds like your neighborhood is full of under achievers that will have little better to do than be jealous of you.