As a pilot, I don't see that the publication of VOR locations here is a problem. This is all public information. In fact, if you think of VOR locations as a type of waypoint, you quickly see that you have to know the location of them for them to be of any use for navigation.
I doubt seriously that they would be considered as a valuable target, since the system still functions today, even though at any given time several of the VOR locations may be out of service.
Pilots use a variety of navigation methods, including Dead Reckoning, Pilotage, VOR, ADF, GPS, Loran, etc. Even most basic training aircraft contain at least two different types electronic navigation receivers.
Just my two cents.