Since I have hit the big 50, I have drawn my technology line in the sand.
NO Facebook NO Twitter NO Smartphone
None of these items will help me in my chosen major retirement hobby - fishing.
All these items violate the level of privacy I prefer. If people want to "find" me, I am in the phone book (and therefore people search sites) and have 3 e-mail addresses.
Facebook also violates my "vanity" threshold. I do not believe that my life needs to be viewed by the entire world.