Never say never.
If Justin Bieber or the Rolling Stones suddenly decided to stage an impromptu concert in a public place somewhere in America without a permit, would the authorities ignore it and shrug it off? Doubtful. Even buskers performing in the New York City subway system can't play without formal authorization from the city.
Not So Fast: Americans Still Want Obama to Seek Congressional Approval for Iran Deal | Cortney O'Brien
Donald Trump Calls Foreign Policy Questions "Gotcha Questions" in Hugh Hewitt Interview | Christine Rousselle