Just set up a good camera with night-vision and stand by, when the vaccinated take the bait and try to egg your house you film it and call the police for criminal mischief, remember which kids where theirs for easy identification. Double burn they if they get arrested, it will most likely be the parents that get pissed at this and most of them don't wear costumes. Just be sure to rinse off the egg before it dries, might want to actually hard boil them so you don't have to really worry about it damaging the paint.