My house has gotten egged a few years back and there is still a stain on the siding. You have to get to washing that off quickly or it will hurt the paint. We live in a bad neighborhood were you can't leave your car out. One night a group of teenagers decided to steal the potted plants off my neighbor's porch and throw them at the first car they saw (mine). Thankfully they took the plants out of the pots and left them empty on the porch. I yelled out the door and then chased them off. My car was covered in dirt though and it got in the rubber around the windows and door frame. It took weeks to get rid of it all. I wish these kids had parents I could call, but if their parents gave a crap they wouldn't let their kids out a 2 in the morning.