My understanding was always that Boundless was a player created universe full of player created structures. The trailer never mentioned any kind of RPG element as far as I am aware, and I see no need for a story to follow. I think we should be able to build/do whatever we like, so long as it isn’t offensive.
A cross with an anti-sign I would consider to be hateful and wrong. A satanic temple is a symbol of a legitimate belief some people hold and I think we should respect that. A sign saying I hate you is borderline I think, but its a message I don’t think we should have anywhere in Boundless
Edit: I think @james articulated the multiplayer part of the game well -