EDIT: It was gay porn. Just when you thought it couldn't be worse...

So every second term in my high school, we have to submit an assignment for religious studies (and often other subjects, but consistently religion). This term, it was a pretty large task involving multiple text documents, mp3s and movies. I won't bore you with the specifics, but I had the idea to use a folder to keep all my progress together and eventually submit. At the same time, I had no laptop and needed a space to store porn because our bandwidth was low (I had to recycle videos a bit. I'm a teenager, going without is not a possibility.).

My family's computer used one account because my father was convinced multiple would use up too much data (sigh), so I decided I would store everything in a folder in the religion folder- who would check there for juicy stuff, right? Of course, I would take it out before I submitted it online.

Today, when I got my marks back and saw a 0/20, my heart dropped and I knew exactly what happened. My religion teacher pulled me aside at the end of the lesson and told me I was getting detention every week for the rest of the term as punishment for this 'sick joke.' My parents were informed, and our family computer was moved to the TV room; my account was also locked out past 8pm.

TL:DR; Submitted a folder that coincidentally also contained porn for a religion assignment, got a term of detention.

UPDATE: For clarification, during the period from submission to getting my marks back I ended up creating new accounts for my whole family because my mother was annoyed that stuff I downloaded (utorrent, etc) was starting up whenever she got on the computer.