I can't say on the newbies yet. This changes daily. Sophie sneaks in there every so often and Noirin depending on what's being said about her here. I'm a sucker for the underdog.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .