If masks are required and somebody does not want to wear one then they should not be going to the park. I'm sure that they will let people know before they enter the park that masks are required. If they do not wear a mask after a warning and a scan of the magic band to record the warning was given, then you kick them out for the day to let them decide if they want to abide by the rules the next day. If they do it the next day, maybe a 1 month ban. I don't think that this would create bad PR to the contrary I think that most people would like that Disney is enforcing the rules for their guests safety. They will really only have to do it a few times to let guests know they mean business.