When it comes to professional sports, there are fans and there are fanatics. A sports fan boos a ref when he makes a blown call. A sports fanatic flies into a berserker rage and threatens the ref's family.
Generally speaking, sports fanatics ruin sports for fans and their families. These obnoxious freaks make the games about themselves and their fragile egos. Relax, sports fanatics! Don't take a contest between groups of beefy men chasing balls around a nice park so seriously. That's just dumb.