Around 1997 or so, I got called into a meeting with my boss, director, and head of IT security. I worked night shift in a wafer fab, and someone was accessing the computers in the office, and visiting inappropriate sites at night (that their new sophisticated monitor found). I was young, and into computers, I guess they assumed it was me. I pointed out that I didn't have a keycard that gave me access to the office area, so it couldn't be me, asked if they checked it. While they were quickly apologizing, I asked what site they accessed.

www.excite.com

The look on their faces when I suggested they actually verify the site before firing whoever it was.....