This is only tangentially music related. Thought of it because I want to say something to a musician.

Okay, so suspend your disbelief and don't ridicule me please, I don't do any kind of online social networking (except this, if you want to stretch the definition). Is there ever a way to comment on a Twitter or Facebook page without making an account? I don't want accounts there. I like my internet presence the way it is.

Are there any popular places other than tumblr where nonusers can comment?