I won't claim to have seen all of the events being discussed but I would say it's not unrealistic for some clubs to want 30-40 seats together. If a club brought 15 kids they can easily fill them. If you get there when the doors open and save them so be it AS LONG as you fill them and the others don't wait until 5 minutes before the 1st whistle blows. It happens every tournament it seems and not really all that unexpected.

Like I said my biggest peeve is don't wait until 5 minutes before to fill them, if a couple people get there at 7 the majority of everyone else should be there by 8 or you start losing seats.