Slightly cheesy strategy to beat clock chewers
If somebody is chewing clock and they're down in the red zone say at the 20, you can take 2 offside penalties with your user in the backfield to immediately deck their QB on a handoff. Then, they either have to decline it and take the loss of down+yards, or accept it. They accept it twice, that means that they're forced to take a first down and be hopefully at first and goal, meaning they're out of rope to chew clock.
This is cheesy as hell, but so are people who try to eat the entire second half. Happy counter-cheesing, lads!