Place a camera outside your door. If it doesn't deter them, then you'll at least know who they are (assuming they are from your neighborhood) and you can go tell their parents so they get an ass whooping. Or if the parents don't discipline their kids, threaten them with an ass whooping yourself if they ever step foot on your property again.
Personally I would keep a Jason mask near by and a fake machete. When the fuckers would ring my bell I'd sprint out after them while maniacally laughing and screaming "my next victim is here." That'll show them.