I do that. :p I have three medium sized claims within an easy hours walk of my make-stuff character that I happily pillage, but those claims are very inactive. I've walked by them many, many times in the past week or so and theres been no changes that I haven't made there. The only one I leave be is the one with a ton of braziers... I'll just wait for that ones claim stone to run out of silver.
![Trollface ¦]](./images/smilies/troll.gif)
I'll just as happily be friendly, though. There is a very, very small claim 5 minutes northwest of mine that I thought was inactive, so I took their stuff. While wandering the other day, I saw that that claims owner had built a lumber pile and placed a few farms - they got their stuff back on my next walk through the area. I even planted a few crops for them on their farmland, since they didn't have a compost bin at the time.