Not to sound like a jerk but you need to get something in writing BEFORE they get hurt. With parents such as you describe, the only time they care about their kids is when they get hurt and there is potential money to be made from a lawsuit. If you get something in writing with the law before they get hurt, and God forbid they do, they won't have a leg to stand on cause the little rat b-tards shouldn't have been there in the first place.
I learned about this type of crap when a natural gas drilling company kept coming on my property over and over again. I had told them at least half a dozen times that in no way, shape, matter, or form were they to ever set foot on my land again. Then one day, I hear a truck pulling up the driveway, drive through my lawn, and into the field above my house!!!!
I about lost it and called the cops. They came and talked to everyone. Even though I had told them all those times (some of the guys on that team I'd told before), it didn't matter. I didn't have signs on my huge half acre plot of land. Therefore, I had no legal basis for telling them to leave...
I learned about this type of crap when a natural gas drilling company kept coming on my property over and over again. I had told them at least half a dozen times that in no way, shape, matter, or form were they to ever set foot on my land again. Then one day, I hear a truck pulling up the driveway, drive through my lawn, and into the field above my house!!!!

I about lost it and called the cops. They came and talked to everyone. Even though I had told them all those times (some of the guys on that team I'd told before), it didn't matter. I didn't have signs on my huge half acre plot of land. Therefore, I had no legal basis for telling them to leave...
