From the legal perspective, I don't think it matters how it is presented as it is flexible and, you do not own Steem, so how you present it doesn't mean that is what Steem is. The interfaces are owned experiences of the founders however, and  how they represent their interface might require legal thought. 

It is a community based on a blockchain, and many sub-communities as well that don't know or interact with each other, even though they share blocks from time to time :)