Would anything motivate partying teenagers?

[lljkk]

I live on edge of a small market town, mostly surrounded by countryside.
About 150 yards away are derelict mostly roofless buildings. They have been derelict for 12+ yrs. There is fencing around them, but it's easy to get inside.
Last 6-9 months, local teenagers park their cars up beside them, chuck heaps of rubbish on ground while in car or within the buildings, have little drinking parties (I guess).
It's the litter that bothers me, I don't care about rest.

Neighbour who works for council, brought the situation to council attention, but hard for council to do much. Owner occasionally cleans up & puts up signs telling the teens they are trespassing (& to stop behaving like pigs).

(Teen!) DS sugested we put up a sign like "The litter is bothering everyone & attracting attention to your den. If you don't stop littering I'm gonna tell the cops that you're using drugs down here. Please just pick up your litter so I don't have to do that."

But it's too long... anyway, do you reckon a notice like that would have any effect? I don't think they are mostly underage, btw, or even using drugs. They just are idiots who throw a lot of litter around.

Solution is probably to remove the parking spot, but don't think landowner wants to do that.

Is there a big garbage bin there?

no... that's a good point, if landowner just put a bin out maybe they'd use it. He doesn't want it to seem like he's inviting them to use the land, of course.

Could you not take them a bin bag over, and ask them to pick up their rubbish?
Tell them the landowner is considering getting rid of the parking space, or that the locals are up in arms about it, and you're trying to help them out, so, here, if you don't leave your crap lying about no-one will be bothered and you'll be left alone?
Tell them you've brought them a bin bag for tonight, but you'll not be supplying them every day, so they'll need to sort it themselves.
They'll probably be fairly receptive, it might not work, but it's got to be worth a try?

It's funny b/c I do know many local teenagers (small town!) but I haven't recognised any of this lot, yet.

I think might be a large (10-15) diverse group so talking to all of them would mean repeat visits. You're right, though, it makes more sense to treat them like adults who can clean up own mess, then to go in with threats & scolding.

You're overlooking the shagging aspect. These sheds are the local fornicatorium. When your DS gets a girlfriend his tune will change.

The police turned up today. And it wasn't me who rang them, either! But I directed them to the easier entrance. The police came and went a few times over 45 minutes (says my own teen).

Hmmm... the visitors stopped littering everywhere in July but they have been coming & going at all hours. Almost always someone is down there. Sometimes noisily. At least one of the kids is only 13/14. N2O containers and lots of beer bottles. I often wonder "Do your parents know where you are?!" as they wander past our house close to midnight.

How much would it cost to demolish an old barn, anyway? I think is land owner's only solution.