What do you mean?
There is de facto responsibility (DFR) associated with any intentional action.
The mob boss situation is different from the car situation I was presenting The mob boss and his crony are both jointly DFR. The mob boss participated in the planning of the crime. Furthermore, the situation is a conspiracy.
Each party is DFR for their contribution to the tragedy of the commons at a bare minimum. DFR doesn't subsume other notions of culpability