It strikes me that a lot of opinions on here are formed from lack of knowledge and understanding, plus there are too many assumptions that social media is only for the shallow and vain show offs.
Of course there are loads of idiots who post, but like many sensible posters I avoid them, don't follow them and don't have them as friends on Facebook or real life.
I think Time40 has given the best and most valid reason for not wanting to be on social media. Wanting to be "under the radar" is also a perfectly sensible reason to not want to join as well.
apparently Only old people use Facebook now
I am old KaptenKrusty 
Gatehouse77 they updated Facebook before they updated the websites.
The way some talk about what's on Facebook etc. makes me wonder if they should chose better friends in real life tbh.
I agree. I don't have many friends on Facebook because I know everyone I am Facebook friends with. I always get suspicious when teenagers, especially, have 5,000 "friends". How can they possibly know that many people?
In one friendship group I am in one of the members won't even consider WhatsApp, so we have to go to and fro texting to arrange a night out.
Fine if it's not for you, but to dismiss it all as pointless, irrelevant, only for attention seekers or whatever when you really don't understand how it all works is ridiculous
Spot on PineappleDanish. It's just ignorance (in the old fashioned meaning of lack of knowledge).
It's exactly the same as people being snobby about microwaves because they think they are only used for heating ready meals 