Did you ever quarrelled with your roommates?

I'm at university now and the arguements I have had with other housemates have only tended to be small ones about the mess int he house or who hasn't done the washing up! The only time I had a big argument was when a girl accused me of stealing her cheese and was absolutely positive that it was me and I hated her. I hadn't done it, for starters I'm allergic to dairy products and so eating cheese would kill me! Despite explaining that she wouldn't believe me. When someone later said they had accidentally taken it she didn't even apologise! Luckily I don't live with her any more.