Unfair advantage to high school kids off for summer. Unfair advantage to college kids, unfair advantage to people who are unemployed or don't have kids or better job shifts etc.Basically that's like punishing teams that can't watch every game. Because for example: you call 6 timeouts through the game... That's 6 additional times my team may sub out my trainee for no reason.
Recently I have been accused to have rigged an election. People don't realise how much GMs play the exact same game as everyone, but are enforcing the rules.