I personally have seen powerlines claim models. Both because of physical contact, and from interference.
I also would not want to be the "test mule" to find out how far from them you have to get before my transmitter antenna became the "negative pole".
While were on the subject, Lightning can travel for MILES. Don't even think about standing in the middle of an open field with your lightning rod-er, I mean, transmitter antenna out when the weather looks bad.

Jetts