You totally can do that, it's not illegal! Schenck v. United States is a pretty odious court case I wouldn't want to be on the censor's side in that one.
No you could not. LegalEagle did a video on this in the last week talking about that ruling that was overturned and doesn't apply to the vast majority of case law anyway.
https://www.theatlantic.com/national/archive/2012/11/its-tim...