User-agent: *
Disallow: /add_to/
Disallow: /add_to/*
Disallow: /email?*
Disallow: /share?*
Disallow: /share_save?*
Disallow: /subscribe?*

User-agent: facebookexternalhit
Disallow: /add_to/
Disallow: /add_to/*
Disallow: /email?*
Disallow: /share?*
Disallow: /share_save?*
Disallow: /subscribe?*