After managing to corral the horse, he and my daughter got him into their fenced back yard.  They made a couple of phone calls, with no luck as to horse's owner, but also put something out on FaceBook.

Facebook saved the day within a couple hours, and soon enough, the horse was liberated from the back yard and trailered home to the pasture he'd escaped from.

People have found birth mothers who abandoned them in fast food restaurants, have helped people locate lost items, so why not take advantage of the vast network that FB has become to help find a lost/kidnapped child?

The decision to use FB to post Amber Alerts actually came about as a result of a local case here in the Baltimore area:

The high-profile disappearance last year of an 11-year-old Dundalk girl has inspired a new Facebook feature.

[...]

The Dundalk girl was eventually found safe in a motel in Florence, S.C., about 36 hours after her disappearance in March, when the motel owner called police after recognizing her from a photo in a news story a friend had shared on Facebook. The girl was found with her father, who police say abducted her after killing her mother.

"Seeing that really inspired us, and what we wanted to do was figure out a way to amplify what people were already doing," said Emily Vacher, Facebook's trust and safety manager, a former FBI agent who worked in Baltimore. "Here's a woman who was just in the community doing her job. She had her Facebook page up. Because someone chose to share an important piece of information, this child was brought home safely to her family."