You do it(I don't think they should do it at all) so you don't have Miami players wearing ACC coastal division champion t-shirts after the game only to be told that they can't play in the gane the following day.
[Assuming we are taking the bowl ban] I am not buying this, why have a team unmotivated against Duke?
It's not lying to the kids either, it is an "administrative decision" so it ain't on Al. Call a team meeting on Sunday, explain the situation and that is that.
So basically you want your cake and to eat it to, never mind what happens to the kids. Plenty who will be on the team next year. You don't want them playing in the title game, which would be their reward for being motivated and beating Duke. What do you care how they play?
You don't want the embarrassment as a fan of losing to Duke is pretty much what I'm reading.