As a fan, none. It's a game.
As a coach, being knocked out of the national tourney semi-finals years ago, down one, when an elderly out-of-position official called an offensive foul on my leading scorer as he was hip-checked out of bounds on a baseline drive that would have won the game.
The call was so atrocious that one of the other officials told him at the scorer's table, "That was the worst call I've ever seen."
I chased the old man off the floor.