There's no way to control people forming a line outside of a store, rules or no rules. It's your own fault for not expecting people to line up early regardless of anything.
They could have done something about the people who lined up early, they were aware of it. At the very least, they could have randomized the order the participant stickers that were handed out yesterday.
I'm not in the wrong for following the rules. Yes, it's in modern human nature to line up for an event super early like you said, regardless of anything, but something, if anything, could have been done about it.
Imagine if you traveled about nine hours from El Paso, TX to compete in the Plano, TX competition. Being aware of the written rules made by Nintendo, you showed up there at 8:45 AM- 9:00 AM, expecting maybe a short amount of people to be there, but seeing almost hundreds.
I'd assume you be pretty upset. That isn't case with me, as I showed up at 9:00 AM myself, but it's relevant anyways.
There are ways of controlling people in that situation. How do you think we got the decent amount of disappointed fans to leave the store without getting violent?