Worlds ARE being created. I don't know why you think this would be a new concept since it's been happening ever since the game launched. Join a hosted server or host your own, then you can play with strangers in an open world and all the risk that entails.

Then you'll also figure out why leaving your personal servers open is a bad idea. Wards would help if they were indestructible but they are not. People are ♥♥♥♥♥♥.