Also regarding selfies, if I was in charge I’d mess with the general public and make a zone , at the back of the park somewhere, literally called the “selfie zone.”
I’d put a bunch of left over costumes, some of the IPs, and other related scareactors in costumes who’s job is to just take selfies.
It would be signposted clearly, and anyone who takes a selfie in a scarezone would be told to go to the selfie zone by ops.
Seriously though, there’s no other option than to try hammer it into people’s brains, to change the culture.
Another random idea they should have nights in IOA where you’re allowed to dress up in costume, and it’s a massive Halloween party, where you can ride rides. No scare actors though maybe a few shows.