I have one, but it is a /r/nosleep version more or less.

I am in a town that I recently moved to to start a new job and have built a friendship and relationships with a city of seemingly normal people. But at night, the tradition is everyone goes and hangs out at the city park and barbecues and socializes and plays games etc.

Well there is part of that park that is a huge hill of just dirt that is on the back side of the park and is not well lit due to it being out of the area.

Kids go over there to play sometimes near the end of the night and occasionally a demon from inside the hill (the hill has caves in it, and somehow the kids like to go in there to tease whatever is in there) will finally get fed up and snag a kid and he's gone forever. The part that infuriates me while I'm asleep is that no one seems to care, they have accepted the fact that it happens and they just carry on as normal and let their kids do whatever.

The demons look like what people say are the sleep paralysis demons.