I house shared with a hippy guy who I thought was lovely and laid back, right up until I moved in with him.
He was the master of passive aggression!
I set the water heater (which he'd never bothered using) in order have sufficient to fill the bath (which he'd never used) in the morning before work (he didn't have a job).
As soon as he realised this, he suddenly started setting his alarm clock for 30mins earlier than mine and skipping merrily in for a nice long (soap-free) soak. Leaving me to wash standing up in a sink of cold water before a 9-hour shift. Nice.
A good day was when, post freezing ablutions, I would NOT discover three or four snoring hippies crashed out on my white leather sofas.
Said hippies would usually have cleaned me out of cornflakes, eggs, milk, tea bags.
"Well, god, I didn't realise you'd be so uptight about it" Hippy Guy would say, looking hurt. "You can help yourself to any of my food, y'know?"
Well that would be marvellous if your cupboard contained anything more than a half-empty jar of Nurishment shake mix and a colony of flour weevils.