I don't actually have a big problem with this. The issue with punishing people for their tweets or comments about Hong Kong is that you are taking action agains

I don't actually have a big problem with this. The issue with punishing people for their tweets or comments about Hong Kong is that you are taking action against them for an opinion they have. In this case, they are just preventing people from expressing their opinion in a privately owned place. Now I would prefer that the fans not be ejected, but I also think it isn't that terrible to prevent people from putting up political banners in a televised arena. It also depends how consistently this is applied - would they also eject someone for holding a sign supporting Trump?