Briefly, the other options you have to further limit what people see about you include disabling Connections Browse, which keeps your connections private, Profile Views, which limits what information people who you have browsed can see, opting out of the Service Provider Directory and the LinkedIn Partner Advertising directory.  These settings will limit the number of eyes on your profile but will not limit your ability to use your LinkedIn profile as a resume.  You can also use this page to control the unsolicited e-mail you receive by modifying the settings on the Receiving Messages settings page as well as the InMails page.