Until you’re experienced in the situation it’s best to just ignore and keep distance. You can run the risk of fed-jacketing (calling someone a cop/fed without solid evidence). Observe others and learn from the experienced folk in your particular groups as to how this should be handled because it does vary from scene to scene.

This is also generally true for media/journalists. If you don’t have media training, don’t make a fool of yourself and by extension everyone else.

When you’re starting out, just get the feel for things and learn how to keep yourself and your friends safe. Learn how to calculate risk and threat model. Learn how to keep communication and coordination with friends in the chaotic environment.