If you have a player on your bench and his team has already played, then it's perfectly ok to drop that player for a FA player that hasn't played yet or even a player on bye IF YOUR LEAGUE SETTINGS ALLOW IT. If the league doesn't like it, then it should change the settings. I am in one league in Yahoo that allows you to drop a player that you actually played in your lineup as soon as midnight hits on Sunday evening. Sounds crazy, but that is what the league settings are and everyone knows it.