Oh...well, I'm living on the top floor, and that dude literally has to climb to the roof to stare through my window. Also, since it's night, it would likely be damn cold. And most likely it would rain. They must be really determined to even be there in the first place. Also, really messed up to look through my window (I'm not terribly interesting). Either that, or they somehow locked themselves out on the roof and are looking for a way back inside, which would be bizarre, since there is no way out on the roof, except through my flat. So if it's not my flatmate and that someone doesn't offer a damn good explanation what they are doing there, I'm more than happy to leave them outside. They can't get in, and it's cold and wet outside, also, at an incline and slippery - the guys downstairs better take care of them.