Oh wow I really love all your reasons. I also love the Simplex approach because you can just post it on FB for a while to give time for folks (who want to keep in touch with you) to adjust smoothly and do so within a reasonable timeframe, while giving the finger to Zuckerberg because you still have to approve whoever is trying to connect with you.

Other apps are more difficult in that area IMO. So yeah I like this approach, I haven't thought about it that way I have to admit.