I live at the bottom of a quiet lane usually only dog walkers which is also a public footpath.
Beyond this footpath is open fields/trees. As soon as the good weather comes local teenagers come down the lane and go drinking in the fields. 
They then go backwards and forwards screaming, shouting, being sick, sitting on my wall, and peeing against my gates.
This has being going on for four years, yes four years! Last week they woke my 5 year old up and she was terrified.
Every time it happens I call the police, they come out eventually and ask them to keep it down.
I've just spoken to the two that have been out. They can't move them on as it's a public footpath 
To be honest I know its not their fault, and this is not a dig at the police themselves, but how can they have no power over this?
I've involved my local councillor etc and still it continues. I can hear them now while I'm typing this.
My dad lives at top of the lane and they smashed his greenhouse last week.
What can I do?