I've come across some disgruntled radio people. This also includes me. Some of the more fun ones would include the guy who was so pissed off at the owners he decided to tell the listeners by putting his message on a loop, and then left the station with his message running.
This guy must've been disgruntled because he would've had to know the end result would not lead to a positive outcome. He had the listeners call up the station and share their favorite dirty jokes. He put them all on the air to share. The PD showed up, and fired him on the spot.
This one guy must not have liked his boss. The station was having a clothing and food drive. There was a place set aside at the station for people to leave off their donation. One couple came by to drop off their donation. This radio guy claimed he was his boss, and sent them over to the corp. office to drop off their huge donation.