Phreaking a TV station
Ah, this would have been a lot of fun - TimeWarner Cable’s local news channel for North Carolina put up an automated system for people to freely post closings announcements and such which were displayed at the bottom of the broadcast. The posts were looked over before being put in queue for display, but the submitter could go back and edit the post after passing inspection - big security hole, and people took advantage of it. A few of the better announcements are here, head to this site for more shots.