I will indefinitely remain on facebook for one major reason.
I’ve always told my students if they ever want to contact me, they will be able to get a hold of me via facebook. And it has worked. I’ve had several students message me about any number of things, because it was an easy way to reach me. I always want them to be able to find me if they need me. Another positive spin to this is that I can keep up with them and see them as they marry and have children and have a positive impact on the world.
Now that my students are minors, I may need to rethink this strategy. But for now, I’ll be on facebook for the long haul. Or until it becomes woefully obsolete and my students all find a better way to keep in touch with me. They’ll let me know when that happens.