I've reported Stormfiber's spam posts (and other bot-like accounts that have shown up here recently) but it appears that WS has pretty much given up monitoring this forum. Not only are users abandoning it, so have the administrators.
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 .