Who's responsible for keeping track of "auto-outs"?

[bniu]

i had this come up in a game, both coaches and my partner all happened to be in the meeting, the coach who had his 9th player leave early informed us both of it and I basically told him about the auto-out rule and he accepted it. I told the other coach that it would be her responsibility to appeal the auto-out whenever it came up, otherwise, if she misses it, we'd just play on normally. Both coaches agreed to do it that way and we had no further problems the rest of the game.

in some other rec games, i've actually had coaches on the side not short a player decline the automatic out and some have even gone as far as loaning a bench player to the other side so they wouldn't be short in the field.

In 7 on 7 football, sometimes, we'd have one team show up with only 5, which was the minimum req'd to play and 90% of the time, the other team would refuse to play 7 on 5 and insist on playing 5 on 5.