Lessee...
On one occasion, I got yelled at quite a bit because my parents assumed I had yet to wash the dishes. They never checked, mind. I had it finished quite a few hours ago, and mentioned this. I was summarily grounded for a month (grounding in my case almost always means no computer either, which means non-stop work/studying till it's over) for "talking back".
Grounded once for a similar period of time for making a mess. Specifically, bleeding on the floor, which COULD have left a stain, though it didn't since I cleaned it soon after. To clarify, I was bleeding because, before arriving at home, I had been mugged and stabbed. Wasn't taken to hospital as it'd be a "waste of time". Incidentally, after they discovered why I was bleeding all over the floor, this was not taken back.
Oh, and every once in a while, one of my parents sees some "kids these days" sort of program/site/article/whathaveyou and searches my room for alcohol, drugs or whatever it is that they expect to find. Never found it - I may have a bunch of problems, but that's definitely not one of them, and never will be. The default assumption is that I just hid it really well, which means getting told to admit it a few times, an extended one-sided shouting session, and often grounding.
Fun times, really.