Yes, many are terrified of Facebook.com but I have learned it mostly replaced the old
Golden Gate Forum we had in the 1990's when I was an instructor with them.
Many great active genealogists have joined various groups and offer lots of terrific help to anyone
one who asks for assistance.
Facebook has a site for Identifying Photos, Unusual Questions, the list goes on.
Old Photo Project: Returning Families Long Lost Photos
Another is Online Divorce Records. same site.
What about the DNA Questions site on Facebook? Or the information on Maps, etc.
I can not express enough that the Facebook.com site carries more information than one could dream of for Genealogy.