As far as I know, if you can't do vox, you can't do facebook.
That's not necessarily the case with SMS (text) messages and I would myself give SMS a try even if voice didn't work. That might not even be true with data on all networks.
I'm not sure which amazes more- that someone on facebook actually called, or that dispatch believed it. I wouldn't have.
There have been various oddball cases of this sort for three decades now, long enough for dispatchers to realize it might be real - someone on IRC having a heart attack or whatever and a call being made to the police department from another continent.
As far as a facebook friend alerting police, that's not surprising at all. That's the real world to kids, and they might be shocked at the thought that an old guy like me might see the note and *not* call 911.
Please, someone, tell me they have a lot of "special learning challanges", I can't say how much my mind boggles at the idea of "don't call 911, but post it on facebook".
Dealing with kids is often a matter of overcoming many "special learning challenges", sometimes theirs, sometimes yours. I grew up in the pre-Internet and pre-cellphone Darkness and there are a lot cases like this where I am reminded that the "generation gap" is very real.
But if their parents let them have a cell, then the parent's should have taught them the RIGHT way to get help.
The parents are likely as surprised as everyone else. The kids may know of the Australian 911 but used Facebook because that's what they always do - you don't call someone and talk when you want to tell them something: you text them or post a Facebook comment!
A lot of kids these days don't ever *talk* on cell-phones. I work with college-age kids and it's not that unusual to call, ringringring voicemail, then text and get an instant reply.
The whole thing is amusing but makes a very real point for anyone attempting to teach kids about this stuff: they really are growing up in a very different world than we did and you have to understand their world if you want to teach them to do things the "right" way, since your predicate life assumptions aren't the same as theirs.