I think restricting "acts" that do not deprive anyone else of their life, liberty, or property does more harm to freedom and liberty than any "disrepectful" acts or speech could ever do.
Restricting "acts" is what our legislature does. We "Restrict" the act of murder, of false witness, of stealing, and racial and religious persecution. It is the legislatures job to do this and the courts to enforce it.
In the past our legislatures banned the burning of the flag and it has been an activist court that overturned the will of all 50 states in this matter.
So what you are saying is that you don't like Americans and their will or their government. You fear what they may say. For once Americans take back their rights, those that have opposed their rights may have some explaining to do.