“A mystery crater spotted in the frozen Yamal peninsula in Siberia earlier this month was probably caused by methane released as permafrost thawed, researchers in Russia say. … Since the crater was reported, local reindeer herders have noted a similar but smaller hole nearby.” (http://www.nature.com/news/mysterious-siberian-crater-attributed-to-methane-1.15649)
The reindeer resent any implication that, as grazers, they could be responsible for any methane production.
“That [reindeer] also avoid [power lines] during the day, when UV light is everywhere, is puzzling, and it isn’t clear why they should want to avoid the discharges anyway.” (http://www.nature.com/news/why-reindeer-steer-clear-of-power-lines-1.14868)
Perhaps for the same reason humans put signs on pylons: danger of death.