The Dept of Veteran Affairs maintains all my health records. Let me tell you, they hire the best IT professionals ever to secure their networks. Very professional! I feel so secure!
One day I was sitting in the hospital waiting room, and I scanned the wifi network as I often do when sitting in waiting rooms. I found a network switch that was exposed via telnet with a default username/password for the admin panel.
This level of sheer laziness could not go unanswered, so I changed the password and renamed the network switch "we suck at IT". A while later in the day I passed a gentleman in the hallway who was carrying a network switch under his arm, and had a look of total consternation on his face.