you can report them to authorities but i dont think authorities will ignore you unless you have a proof a video would be nice to make your self clean, you dont like to be arrested as one of them do you? cause you mentioned they are using your room as a den
You can set up a website with live video cam of drunks and druggies, and put some adsense on it to try to make some money.
dude, you CAN do something about it, but a heed of warning for you. Dont try to be a smart ass as Hindi filmi heroes. Even if u complain 2 cops, that guys will haunt you or even physically damage you after they do their time. So better thing is try to find another flat. Its the punch line for you
dude!Watch bollywood movie[Hindi] "lage raho munna bhai" starring sanjay dutt,vidya balan,arshad warsi etc and use strongest weapon "" Gandhigiri"".In a couple of days your neighbour's attitude will change for sure...try it......it ll work out.......chill ROCHISHMA