See I think you let them play unless you really don't want them on your roster. It is a prime chance re-recruit kids and also who care unless it's a NYE6/CFP the bowl games are just glorified exhibition games with a chance to evaluate next year's with everyone sitting out.And if I'm the coach, I would tell said player that if you don't want to be here, then don't the door hit you where the good Lord split ya....
I think as long as they make the effort and practices they should play.