I don’t think the abandoned sites that are privately owned would still be actively targeted.
One drawback is that most of the abandoned sites are easy to find using search engines or Google Earth. Being the owner of one I often run into people that find my site using those methods.
In theory they shouldn’t be. But given all the various attack profiles that were dreamed up and all the little pieces of paper they scattered all over the globe to give the appropriate instructions to the appropriate launchers I’m not sure I’d really want to be my life that every single piece of paper in every single silo and sub has been appropriately updated.
Definitely having your location publicly known at part of disarmament compliance doesn’t help either. Gotta wonder how many people in your area don’t know you own it and have your place as their bugout destination because they think nobody else is that clever.