Why not scarlet letters or yellow badges?? That way it would be easier for the new environmentally-minded "uber-citizen" to recognize and report those who aren't "in the right mindset" of global warming consciousness.
Yea, I think the liberals still have a stash of those “Yellow Stars” left over from the concentration camps during WW II; as true leftist, then, as always, they got carried away with planning and made too many!