I guess the only reason someone might not do this is if they prefer internet anonymity - like if they were publishing very sensitive or personal content that they didn't necessarily want to share with all their friends and family. I think it can take a lot of courage to find your voice as a blocker, and it's easier to put yourself out there with strangers than with people you know in real life. Once on the blockchain always on the blockchain!!!! Imagine if on FaceBook you couldn't go back and delete those really embarassing drunken photos? Along those kinda lines - just a thought, I'm sure there's some people that take this approach. But maybe if they gain confidence after a while then they'll try to pull in their friends etc. Just a thought!