Authorities or private individuals attempt to prevent a lawful gathering or protest.
The right to peaceful assembly and demonstration is a fundamental right. Some legal systems require a notification process, not a permission system. Authorities may not simply refuse to allow a gathering because a notice was not given, nor may they disperse a peaceful gathering without lawful justification. Law enforcement has specific obligations before interfering with a gathering, including engaging with the organizer and issuing warnings. Peaceful protest is a right, not a favor granted by the state.
After you respond, they may push back with these arguments. Members get the full rebuttal for each.