#4: Eddie Guerrero takes out an invader

As we've seen on this list, there are several different ways fans can get into the ring, but by far the stupidest thing to do is to actually try and attack a wrestler. Not only are you going to secure yourself a nice bit of time behind bars, but there is also the risk of legitimately injuring one of the performers.
One of the worst examples of such idiocy was when a fan interrupted a ladder match between Eddie Guerrero and Rob Van Dam and tipped the ladder while Guerrero was on it.
Did you know a top WWE Superstar just wrestled outside the company? More details HERE
Thankfully, Guerrero managed to react quick enough and land on his feet. He then promptly landed a right hook on the intruder before he was dragged off by security.