The same logic that would be used to shut down these displays is the same infringement of free speech logic that would impose the Censorship Doctrine to silence the voice of Conservative opposition to the MSM/Democrat complex. They want to right to not be offended. Come to think of it, but for the lack of money for lawyers, it sounds like you perhaps agree that you also have the right to not be offended.
It’s just a side comment. Of course people should be free to put up any cartoon characters they want, any day.