I have noticed that a lot of my sponges are slowly being somehow claimed by other people. Around 4 days ago, I realised that all of my cactifarm was claimed by someone called "nh_Lucid", who at the time wasn't seen online nearly ever. Before that, a friend of mine had their castle claimed by someone else, and this caused a lot of trouble. This can be seen at my warp /warp cactifarm.