They appear to be colony animals. 200 lbs of nesting materials can cause a multitude of problems beyond the fire. Simpy removing thenest doesn't solve the problem. Other critters nests aren't this big. The wind/ice/snow loading theses things get could knock out the poles too.
Given the choice between pretty birds and heat in the winter, the birds lose.
What about osprey nests? They are big and ospreys like telephone poles. So do eagles.