> Users are anonymous and posts go away. This is the one that always gets brought up, but the fact is that by having ephemeral accounts and posts, people are fr

> Users are anonymous and posts go away. This is the one that always gets brought up, but the fact is that by having ephemeral accounts and posts, people are free to speak their mind and to change their position later without ill effect. This. I'd also add the lack of "upvoting."