put hot glue on the doorbellthey'll never know, neither will those pesky mailmen and insurance salesmen!
three birds with one stone. genius!
Use an infrared camera, catches heat wave signatures, could solve your problem real fast or put some tacks on your walkway so once they run up, BOOM thumbtacks stuck into their shoes and feet!
if I lived in america they would have been shot already for trespassing lolsadly this is canada and we can't do that here
Beat them with a hockey stick
Seriously try thumbtacks out on your walkway in the dark.
Second idea:Try to convince some generals of the U.S Marine's to deploy 10,000 of the finest soldiers to your doorway and set up sandbags and defenses. They will plant landmines and position 450 Tanks outside the doorway to assist the marines. And also deploy 20 AC-130's to moniter your house each night.Then the kids will think twice on knocking on your door.I think you should to what Querty said. They knock on the door in the dark, so it'll be difficult to see the Thumbtacks. Hopefully they're sharp enough to penetrate the bottom of the shoe.
eat them
not only is that probably illegal, but then what if a mail man or someone comes? my mailman never did anything wrong
my jaw doesn't really go that wide