I'm not a lawyer so this is just my take.

First, verify via your plat that they do not have an easement, On my property the front 18 feet (24 from the centerline of the road), and the rear 10 feet is easement.
Wether they have used it before or not, it's easment.

I would then send them a letter and/or call them, if you are correct and there is no easement my bet is the guys that strung the wire either didn't know better or figured who'd complain ?

If you verify they have no easment, DO notify them.

__________________
KLK, MCSE

1990 500SL

I was always taught to respect my elders.
I don't have to respect too many people anymore.