At 2:55 P.M. today leonardo and I (Along with two other people such as Abby Stone) witnessed the terrain getting largely fucked up.
I'm not an admin/op/mod and I may be taking this like one since I was in the administration team for different servers so I'm used to behaving like one.
Now what I'm told there are generated mineshafts + there ARE going to be mineshafts. Here are some pics of major greifing.
http://steamcommunity.com/id/Redbark/screenshot/651001246691443004 (http://steamcommunity.com/id/Redbark/screenshot/651001246691443004)
Then do the last five. I'm too lazy to link ALL OF THEM
All of this has been fixed with snow blocks.
I don't see any grief pics... but whatever if only you noticed it and someone fixed it already it probably isn't a big deal.