Flutterby™! : Set up, like a bowling pin

Fascinating: I'm not as up on Bay Area political scene history as I probably should be, but activist Richard Aoki, who provided guns to the Black Panther Party, was an FBI informant. Then, as now, we're seeing that it's a fine line between investigating a group and providing them with the means of doing violence (and in many modern cases, urging them to that violence), before arresting them.