It's interesting to note that to prevent this behaviour in such crowded events, they still organize the overnight groups in lines, and they are usually allowed

It's interesting to note that to prevent this behaviour in such crowded events, they still organize the overnight groups in lines, and they are usually allowed to enter the premises only AFTER a few thousand of the ones who respected the rules have done so. So it's really a matter of hiding well enough from the staff until the "legal" hour of lining and find the first "real" line, if you want to go in first.