They don't have different "needs" ... they just don't realize what they've signed up for. It was very easy to get rid of Facebook ... I sent a final message letting them know how to get a hold of me. If they don't want to engage elsewhere, it's relatively easy to determine the depth of our friendship.
I've been in solitary confinement for going on seven years. I doubt you'd enjoy it as much as you think. We're social creatures.
I do want to point out, as I was a bit snarky in my last reply, that I appreciate your more balanced tone here.