Most deer shun power lines, but not all of them. Some of the more arboreal and wirewalking-inclined deer are actually attracted to them even if they have little actual experience with electricity.
closeup
http://www.santafeghostandhistorytou...s/r0300265.jpg
distant view
http://www.santafeghostandhistorytou...s/r0300264.jpg
Otherwise, you won't find deer going anywhere near downed sparking power lines. The same can't be said for humans.
Since most power lines are 20 feet in the air or buried, the deer are never in actual proximity to them and hence most are not bothered by them too much.