I wasn't on Facebook. I specifically joined to get access to the Diabox geeks (that's not a derogatory term, its what they call themselves.) (Actually it's a tiny organisation and a couple of years ago was very well controlled. The 'geek or geeks' can't be contacted by us customers, but they provide updating info from time to time; there is a small group who confer on what the next most important bit of code needs improving or developing, from suggestions we make and they advise the geeks accordingly who respond accordingly. It is in practice great configuration control for the software development.)
I needed to be ruthless in not taking any notice of other Facebook sections, which can otherwise be extraordinarily invasive into your space, wanting to be your friends - and if not careful I could have had hundreds of friends .... I kept deleting as much of the incoming material as quickly as I possibly could; I stupidly just read some of the earlier ones and that seemed to attract a deluge of more notifications! I now only get a tiny amount of new notifications; I wasn't aware that I'd finally found an "off" switch and if I did it was switched blindly, because it wasn't obvious to me!!