After starting a new toon and setting across the land, I ran into many abandoned claims. Some were broken into, some just abandoned. After reading the forums later I realized I had done good traveling many hours from Boston to set up my small farm. I generally invest in newer games because I believe that even F2P require a lot of work by the devs. Looking at the cash shop I bought a few silver packages (even though they are still in the bank) but decided it was a waste of my money to buy items that some super powered toon could steal with little or no problem.
Anyway here is a small suggestion. As long as the claim stone has silver in it, the claim cannot be raided. Or maybe the buildings cannot be destroyed but items can be stolen. This would not only give the players a little more sense of security, but would encourage raising silver.
Also I am sure this would still leave claims available for raiding.
I am a newer player (at least in the forums) so my opinion may be way off base, but relative to my viewpoint (so far)