Considering that much of what's on people's Facebook pages is against the law to even ask about (in some jurisdictions) it's probably a wise choice. Stick to what's provided by the candidate. I provide a link to my LinkedIn page on my résumé, but nothing on it touches on areas I know would cause problems. Most of my coding is in private projects so I generally don't bother with listing my GitHub.

For example, I know that where I am it's against the law to ask if someone is married during the hiring process and that's pretty clear on many Facebook pages.