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Strongly disagree. Those cops have obviously made enemies from this.

Legally, they can. City ordinances are applicable to city employees, contractors for the city, subcontractors doing work for the city, and those who operate under permit of the city. All of these people agree to abide by city ordinance while they are working for the city or operating (a commercial term) under permit from the city. Cities cannot pass laws that apply to "We the people". Every state in the nation is very clear about that in their state's constitution. Laws must go through a very specific procedure to become law. Procedures that include public notice of a proposed bill, how each bill must be announced for a vote, voted on by both houses of congress, and signed by the governor, vetoed and then over rides by Congress, and announced passage into law, as well as announcements about the law going into effect. These procedures are why "ignorance is no excuse for breaking the law" is a thing. City ordinances go through none of these procedures. They cannot apply to the people.

How many protesters were arrested for being too loud during the BLM riots? Or any other protest?

And more importantly the woke use megaphones themselves, airhorns, and group shouting in order to outright silence people's ability to speak entirely. If one side is allowed to use megaphones, and noise-tactics to prevent others from speaking, effectively they've censored you/removed your right to speak at all.

Actually the more I think about it, the more this sounds like the irl equivalent of what happens when tech companies claim they don't engage in censorship, they just "limit reach."