I can just say from my experience using a 3-day CityPass PH on Thanksgiving weekend and making a total of five entrances and reentrances, I was asked for ID every single time. I think that's reasonable because spot checks aren't going to work. I think they're starting to insist on "their pen" now as well as machine printing the names. One of the new tactics of the rental brokers is to have the name written in a dry erase pen that can be wiped and a new name placed. They might even instruct their customers to bring along a disguised dry erase pen, although if I were a CM I could smell one easily.