Tons of little kids Are terrified of him when there's nothing to be scared about. Reply with any "proof" of his existance you have, ane I'll do my best to debunk it.
The mystery that Herobrine adds to the game makes it more interesting, but I'm shocked that people fake seeing him. I think they should add him to the code, but limit his abilities to only a jumpscare and not actually killing the player. That could be an interesting feature.