Part of the mutual aid activism training I did with many new activists, over 3 decades, sometimes solo teach-ins & sometimes collab teach-ins - always included training several folks to work in relay teams to spot/document possible state agents/agent provocateurs & how to kettle & remove them from crowded protests & active large blockades. It's ESSENTIAL proactive training. There's always state agents & also right wingnuts who try to infiltrate big activist movements.