The time I hacked my high school
I remember the time I "hacked" my school library's computers. I changed the homepage on the browsers to my Geocities blog (this was almost 15 years ago). Later that day I was pulled from class by a security guard. In the library was most of campus security and most of the administrative staff. They were sure that I had put my blog on their servers and destroyed their website. They even had some teacher from the computer lab who couldn't seem to figure it out. Once I showed them how to change the homepage  back (there was a tense moment when their server took forever to respond) they stopped threatening to have me arrested and made me sit quietly at a table until the period was over.