I want to know who is doing all this "looking down upon" pool hoppers. Does anyone really notice or know if someone is pool hopping?
I think if you ask they'll tell you that is fine. I also don't think it even matters enough that you have to ask unless you go to the pool and see them actually kicking people out for not having bands. What does it really matter if your friends swim with you 1 evening? What they don't want is people feeling free to flock to deluxe resort pools and crowding the guests paying the big bucks. If they didn't have this posted policy, even people not staying at Disney would be swimming there which would chase the paying hotel guests away. Since you are paying guests, and them joining you is part of you enjoying your hotel stay, I really doubt it's going to be a problem.
I know people are supposed to wear wrist bands, but we frequent Beaches n Cream and have looked around to find many people not wearing them.