Why do big public protests any more?
Belarus used a tactic of forming small protest events with smaller groups of people. They just did in random locations and often.
A police force at any city can organize themselves to try to contain and confront a major protest group of 10,000 people ... but they would have a very hard time dealing with 10 1,000 person protests happening at different locations around a city.
If you break up the protesting events into smaller and more dispersed events ... the police would have a really hard time sending different groups of officers to multiple locations at the same time or to send them running around a city to organize at one place to another.
If you plan and organize one major event with thousands of people in one predetermined location ... that only gives law enforcement an opportunity to organize themselves to get ready for all of you ... it's basically playing into their hands, into an event that they can control and manage.