Is it time to start calling out bad cyclists?

I'm not sure how best to handle this - drop back (frustrating drivers behind), get tougher wheels, or start writing letters to the council about the road quality?

Riding in primary means a little more aggressively simply because the main roads I travel on have a ridunc amount of potholes in them. So speed + dodging holes = meandering, which I sometimes worry might be mistaken as insanity by drivers. Problem is further complicated at night.