Odd penalty sequence question

[Robert Goodman]

My only question would be whether time expired for the game. Since you described a long live ball sequence as occurring "last 30 seconds", I could imagine its having consumed it all.

Assuming no touchdown was scored, team B could then decline the penalties and the dead ball fouls never officially occurred, because the game was over. If a touchdown did occur, team B could accept the penalty for illegal forward pass, and with the loss of down the game would still be over, and still no dead ball fouls. If the league they're in wants to assess additional outside-the-game penalties (suspension, no cookies, whatever) for the players' behavior afterward, that's on them.