Can you please explain what you are trying to do? Are you just trying to change your display name on that community?
Note that we host the Hoop.la service that powers the community, but we do not manage the community. If you have questions specific to the site (such as changing your display name), I'd suggest that you contact the site administrators/moderators.
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 .