These links have been posted before, but they bear repitition.

Why Misogynists Make Great Informants:

How Gender Violence on the Left Enables State Violence in Radical Movements

The beauty of hindsight how a police informant acted so blatantly, and got away with it

Rob was expert in calling other people out as being not trust worthy, or being corporate/police spies. In general he spread paranoia about other people. Numerous mass actions he knew about were stopped from happening by police beforehand (ie, a planned mass action at a GM field), but he was highly skilled at pointing the finger at someone else. Especially if that person had been questioning his authenticity.

I encourage everyone to read these links to enable to recognize police informers when they see them.

One way to limit the damage police informers can do is to have a policy of never engaging in violence. Informers invariably promote the use of violence.