I guess it's fine to put the backups in for a quarter if the game is well out of hand. I would have a problem doing that for an entire half (let alone entire games), outside some circumstance where you have some injury-prone superstar or something. I prefer though that they play hard the entire game. I hate that 'running up the score' bs. I loved when the Patriots kept throwing it when they were up by 4 TDs back in 07. This is a game of men, don't take it easy and don't hold back.