RecRef
The diatribe may be a little harsh, but the message is right on. It is not absolutely essential that you hold a tight line on the rules when the game is essentially over. Call what you absolutely need to call in these situations, especially when dealing with a team that is on the bad end of a pasting. If it the team in the lead by 50 with 30 seconds to play, call it and give the trailing team a chance to cut it to 48.
But you don't need to pile on the pain on a team that is out of the game already.