Well, I'm probably older than most of you here. I was one of those children who nearly always came top of the class at primary school. Maybe it just wasn't a particularly academic year but, along with two others, I managed to pass the 11+ exam (see, I told you I was older!)
I can still remember one of the girls who didn't pass saying to me, in a bitter kind of tone, "This means I'll be going to the secondary modern school. I suppose your mum and dad will be going round showing off about your result!" I told her no, they really weren't boasting types.
I thought her snarkiness was a bit OTT but in another way I sort of felt guilty that I'd passed and she hadn't, and sorry for her because maybe she thought she'd be less loved or valued by her parents for not getting through.
Skipping forward in time, I did reasonably OK with O-levels but not brilliantly as I flunked a couple, including maths which I knew I'd need if I wanted to go to university - so I ended up having private tuition. (Incidentally, I would say that if any child today is achieving all top grades in what? 8, 9, 10 subjects then the exams are too easy! Back in my day (hehe, I love being able to say that now!) that would have been unheard of.)
A couple of years back I bought a paperback book (good, but nowhere near a classic) in a charity shop, and the lady who served me mentioned that her nephew had studied that book for GCSE English Lit. I opened my mouth to say, "But whatever happened to Dickens and Austen and the Bronte sisters?!" then closed it again. I didn't want to cause offence but I think in the meantime those exams have become less rigorous.
As for me, I did go to university in the end and I'm now educated to postgraduate level. But actually I felt like my achievements didn't really amount to much compared with some (older) members of the family who managed to get professional qualifications, or get ahead in other ways, without going anywhere near a university, and were driving around in Rolls Royces and Jags, enjoying their millions.
Sure, I'm a real academic type now and can usually answer at least some of the questions on University Challenge, but I'd give that up any day in exchange for a Roller! 
As for social media ..... I'm not on Facebook, and know of many others who don't wish to be, or who've left because of that whole "Look at me and my wonderful life" kind of show-offy stuff as described in some posts here. I find all that stuff really naff.
And there's all that research from universities in Denmark, Germany, the US etc to indicate that, certainly with younger people, it's likely to make them less happy or even depressed as they end up comparing themselves with others. According to the happiness experts, that's just about the worst thing you can do! And could well apply to older people too. Stay well away, would be my advice.
I would suggest the best thing is for children to be valued for just who they are, and not for their exam grades. The results don't mean much beyond academic ability anyway, and don't have to be any indication of the child's future success. Remember -- even Einstein didn't do very well at school!
Apologies for this being such an essay ....