Wow...I finally found a way to get some support for the "skipped" player. It's quite a stretch from trying to kill his hand because he didn't speak up quick enough to stop the out of turn action!
Adam is UTG...Billy Bob and Carly both decide to check OOT. The action shall be backed up to the proper bettor, Adam. Adam may check or bet (he can not raise). If Adam bets, our current rules allow Billy Bob and Carly every option...call, fold or raise.
Mike, your example for angle shooting can also be applied here. Let's say that Adam deliberately allows the players to act out of turn only to check and then raise! I guess I'm overthinking this situation...of course Adam can't check raise...there is no bet to raise.
That's another topic for discussion. Adam is skipped by Billy Bob and Carly, they both table their cards...Adam says: "Hey, it was my turn to act, you both skipped me!" DEALER: "Okay, what do you want to do?" Adam: "I check-raise"...Is that allowed? Of course not. My question should have been if Player's bet out of turn, not check...Sorry for any confusion.
According to the current rules I would say, YES. Think there's a possibility that Adam is angle shooting? Perhaps if the OOT players bet, instead of check.
This is why our rules need some work, in my opinion.