I am a second-year PhD student in the US. I work in my lab during the night-time. I find that one of the senior PhD students in my lab is into drugs big league. I would not mind that if it were not to affect me, but it does in two ways - sometimes the smell in the lab during the late hours is horrible, and he moans incongruously and loudly at times without taking others' presence into consideration.
Talking to the supervisor may not be of use, because he takes it coolly and I have heard the two joke about drug use in casual conversations. The fellow PhDs also take fun in his eerie ways, and him being an excellent and helpful chap, they do not want to fuss about his habits.
If at all, should I raise this issue with my advisor, the department or the police? Sometimes I feel I should be silent about it all, bite my teeth and bear it for a year as he will graduate then. But at other times, I am so heckled about being disturbed during my hours of concentration. Is there a discreet way for me to handle this tricky situation?