a traktor mapping gets installed along your copy of traktor since version 2.0.3 or 2.1.1 (dont remember exactly) - it's in the default settings folder.
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 .