How soon until coal/gas powered power stations will need drone defences?
1 pound of high explosive could fly into a power station and it might be able to find a sensitive point.
The cement is hard to damage, but you could smash a few insulators or power connectors, and one good enough to do that would only cost US$200 - cheaper by the dozen!!
If the bull headed do not shut down power stations. there are planty of loose wackos out there