I heard this discussed on ESPN radio the other day. They were sort of for, sort of against it. Wanted it clarified a bit they said, as in, one of the teams they were referring to was pulling out gimmick plays to run up the score, it's like they said, if a team has its fourth team running back and third team line in there, and are just running draw plays, you don't tell them to stop. You're right, it does hurt the backups, but by the same token, how often does a team just score 50 points in 2 minutes? A coach can tell that they are white-washing someone and adapt when they sub, if they're concerned about subs getting playing time. I think the excuse of it hurting subs playing time is a bit weak because if it's 40 nothing, you can sub then, not wait till its 60 to nothing to sub.