And that's kind-of the issue with the style of moral quandary the OP is trying to go for here. A true moral choice is something you make on your own, not beholden to anyone else, and then you live with the consequences. That simply doesn't work in a collaborative storytelling system, where your choices in-character can screw up the enjoyment of other players.Ah, that makes a lot more sense.
I would boot a player for that stunt (trying to wreck the football). The time to make a moral choice is when the job is offered, not after the PCs have invested time and risk. At that point,. the football was the property of the group, and the PC had no right to deprive the others of their share.
Of course, I have a permanent and unbreakable rule banning PvP, to include theft from the party.