@yulilin3, I caught a little bit of your livestream yesterday (btw, thanks for doing that!) and here's one thing that I noticed... You were in the Universal store and there were a couple of people paying for their items. Here is an example of a photo from DFB:
View attachment 494784
I noticed that both people were not standing on the circle while their purchase was being processed. They just stood in front of the circle near the counter (in the case of this photo, there is something there so they can't do that), so I can already see where people aren't following directions. Yes, you can walk up to give them your merchandise, but I believe you're then supposed to go back to the circle while they ring everything up. It reminds me of how at Publix how people just can't follow the one-way signs on the ground. There are people who just don't read instructions -- I don't think they're deliberately being defiant, they are just too much in their own world. My point is, despite UO's (or WDW's) best efforts to get people to social distance (or wear masks or whatever), there are going to people who just can't follow directions.