In a race, people all start on the gun right, it's not like someone just comes up 5 minutes late like i'm gonna start racing now lol.
but if they did, how would that hurt the other racers in any way?
also, everyone understands your first point that its how its been done forever. but i think the general consensus is that there is no reason to turn down those guys except for the reason that you feel its so necessary. its not like if you let one or two more guys in then 9000 people are going to all of a sudden enter. this forum only has a few active people anyway. if its within a few hours (like it was in my guys case) or even a day or so, then why not? but in all honestly, i could care less if my guy gets in the tourney or not so it really doesnt matter anyway.