There's a student on our floor who always has her boyfriend round. We don't know anything about them, apart from that they have really goosebump-inducing arguments about once a month. Every time we call the porters over to intervene, because it is really, really scary. And yet it continues to happen. Erk.
The same thing in first year, a Chinese student with a live-in boyfriend. Never said a proper sentence to us, but at 3am they would have huge full-on screaming fights, running up and down the corridor, shouting wildly. She would lock him out of her room and he would bang on it for ages until she let him in. Apparently they had viciously loud sex too, but thankfully I was opposite and not next door, as my friend was.