Thanks @healingherb . I'm generally a very private person, but I also find it such an intriguing situation - and also one that I've seen happen to quite a few people over the years on facebook - that I thought I'd write about it.
I've always been interested in ways that new technology - particularly the internet - changes the way we live and interact and connect. I believe it can be a force for good, if we can work out how to use it properly, for its higher purpose.