How to recognize a police informer
These links have been posted before, but they bear repitition.
How Gender Violence on the Left Enables State Violence in Radical Movements
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.