violate them suffer penalties...i.e. you cannot say anything you want with impunity...its' the law....and since those restrictions are now law, others can be created...however, the 1st Amendment is a strong protector of free speech, so any restrictions must have clear harms identified, as well as focused measures to discourage harm to others.
Checkout the landscape for this issue in the attached article...
Link: https://academic.oup.com/ajcl/article/70/Supplement_1/i278/6597032