I used to be lost without my watch, but after several years of NOT wearing a watch at work (NHS policy) and not being able to (skin was annoyed by the engraving on the back) I hardly notice that I'm not wearing it. Still carried it around though - just in case!
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 .