HELP! Urgent! Kids by the bus stop are causing serious issues?

Hi so long story but plz read. So we have 2 bus stops for my schoolbus. all the trouble is by the 1st stop and my house is the corner. today a couple of kids were throwing bricks and huge rocks at the table outside and it has gl candle jars on it which i think they were trying to hit. unless they were aiming for the windows. and they are hanging on the fence. then the bus came so they left. another time they actully jumped the fence 2 get in my backyard to get some ball. yesterdaynight there was a boy in the tree next to our house. and the tree hangs into my backyard. anyways the boy was sitting there watching the house and he could easily see the bathroom window where we shower and do our business. what do we do? the cops never come fast enough and these kids have no respect. i live in florida and these boys are in middle school. also there are propane tanks for the barbeque. 1 of the rocks couldve easily hit one and couldve started some horrible. Please Help! Urgent!