There have been regular anti-vax protests throughout the pandemic. They are afforded time to disrupt traffic with a procession that usually ends in parking at a central district and legitimately ends that day. No cities have blocked their rights to protest within the legal construct they've been afforded. If this is too authoritarian for balancing the rights of protestors and the rights of everyone else, I recommend finding a new place to live. This is a sad but necessary limit of protest to distinguish protest from occupation. Even "occupy NY" largely allowed people to live their lives without significant burdens (though I'm sure some were unfortunately affected).