They will NOT allow anything that embarrasses them. That includes any signs they don’t want, any questions that humiliate them or even t-shirts that call their support of the Chinese government into question. They will say it is a violation of the tickets, although there is nothing on the ticket purchase about political speech, they will still kick you out for violating something about making the event a safe place.
Plus everyone that attends are white knights and even the laughing at the mobile game last year and questions about it were very controlled.