This is what I would do..
dont ever speak to them again..dont go over,
and if they come over to your house, dont open the door..
when they are playing loud music again, call the cops..
let the police deal with them..its their job..
keep a videocamera or camera handy, in case they do try to damage anything on your property..
let them see you filming them through the window..
if they do come over (whether you see it or not) call the cops again..
people cant be allowed to get away with things like that..
"doing nothing" is IMO the wrong thing to do..it wont get better if you do nothing..
actually..you should call the cops right now..report them for assualt..
the cops might not be able to do anything this time, with no real evidence,
but if you keep having the cops come over whenever the thugs deserve it, eventually they (cops) will probably have a good enough case to haul one them away to jail..or they (thugs) *might* actually wise-up and start acting like decent humans..
unlikely, but you never know..
the cops might have to visit 3 or 4 times becfore they have enough evidence to do anything, but if they (thugs) keep it up,
it will probably come to that..but you have to get the process started now..
you shouldnt have to hide in your own home..this is America..
we can do something about petty 2-bit thugs..
I would get the police involved right now..start the paper trail..
you will probably need it ..
good luck!
and keep us posted!