If it's possible, I think it would be great to have claimable areas in the END and the NETHER. This suggestion came to mind after I built an enderman farm three times in the end, only to have dumb shits grief it each time. It was a simple farm, but effective. If there were areas that could be claimed, and areas that can't as it is now, we would have the best of both worlds. We could build farms and other structures that could be shared by everyone one, without the risk of someone griefing it after it is complete.