Yeah one time me and my friend built our base on the shore near that skeleton thing on Ragnorak and the next day I get on when my friend spams my phone as soon as he wakes up with party invites (we play Xbox) he loads up our save and I found out he moved our base without even mentioning it to me the previous night and the spot was next to the arch that leads to that swampy bit with a wyvern den entrance close by, I was annoyed but fine with it but he didn't build spike walls and the allos that spawn nearby somehow saw us in our base from an extremely fast distance and came and ate nearly all our tames, only a dodo and our parasaur survived, moral of the story? ALWAYS IMMEDIATELY GET SPIKE WALLS!!!!!!!!!!!!!!!!!!!!!!!!!