It had me thinking about everytime someone mentioned a terribly offiiciated game or a missed call. The soccer referees certainly don't have it very easy, that's for sure. Just think of how far away from the play they are at times. Imagine refereeing a basketball game or umpiring a baseball game from so far away. Although, there aren't as many calls, I would think it would be one of the most difficult sports to referee. Not to mention, on some of the foul calls, refs are blocked/obstructed by other players from seeing what is going on.
I've refereed basketball, soccer and umpired baseball, it's certainly not something I would be interested in doing, except on rare occasion.