If someone is bothering you, the easiest and least aggravating way of dealing with it (other than somehow making peace, of course) is blocking that person.
- Go to his profile page.
- Scroll to the bottom, and click on the "Block this member" button.
- Confirm your choice by clicking on "Yes I'm sure" next.
You can unblock the same way.
Blocking has a number of consequences:
- You cannot see the profile of members whom you have blocked, nor can they see yours.
- You cannot send them messages, nor can they message you.
- You cannot write recommendations for them.
- The only exception is abuse flags. The reason is so that abuse flags can not be evaded by blocking.