Jones, Beckett, and Mercer aren't pirates, and given the situation ignoring the guidelines, including the parlay, would have been the smart move. They were willing to set free a pissed off god to help them destroy the enemy, but aren't willing to violate a parlay...I just don't buy it.
I seriously doubt knocking Jones over would have done much good. The only way to kill Jones was to stab his heart. They probably wouldn't have been able to knock him out of the bucket. He'd probably just automatically transport to the nearest water source.
