#2. Former WWE Superstar Highlander Robbie
The Highlanders were making a name for themselves in the mid-2000s on RAW. In 2008, Highlander Robbie, one-half of the team, decided to make a trip to Orlando to sit in the crowd for a TNA, now IMPACT Wrestling, taping.
Surprisingly, the promotion decided to show Highlander Robbie on-screen, using his real name to avoid any lawsuits. It wasn't as though Robbie was a high-profile star or looked too impressed when the camera was on him.
Word got back to Vince McMahon, and a fine was handed to Robbie. His release from the company shortly followed. Although TNA was not considered a rival, the WWE Chairman was not impressed with his actions.
#1. Paul London was fired from WWE by Vince McMahon
On the night that Vince McMahon's limousine blew up, the WWE superstars gathered in the halls to watch McMahon exit the arena. There was one noticeable wrestler who appeared to have a smile on his face: Paul London.
When Vince watched the segment back, London's smile caught his attention, and he was enraged. London was immediately punished, and it wasn't long before Vince fired him from WWE.