Well first of all they do control who gets in and out simply by separating the protesters from the actual event. Most of the time the anti-Trump people are forced to congregrate elsewhere, usually miles from the stadium. So the only people that get in are Trump people, thats what I mean by they are staged rallies. If some other people actually manage to slip in well good luck to them, these rallies aren't exactly safe. Most of the time they will just get tossed out by security.
So, by "completely staged" you mean, "the Secret Service and event security doing their job". Which also means that, by your own admission, he's filling the stadiums with actual supporters. I'm not sure how that helps your argument, but you do you.