Honestly, I avoid it almost completely.
I have a Facebook account, but the only reasons I keep it is:
1) Because occasionally I see something amusing, like funny cat videos or memes
2) Because it allows me to see occasional updates from distant friends that I'm otherwise not close enough to keep in touch with
Even still I'm lucky to go on Facebook once a week, and I post something on there myself maybe once every couple of months if that.
Personally, I think Twitter is pointless since I really don't give two hoots what some person I don't know is thinking this very moment...and I think Instagra is pointless because I don't care for seeing new photos every time a random friend sits on the toilet.
I think it's sad that society has gotten so self-obsessed to the point where people feel they need to share everything they do with everyone in the world - while people might feel like others actually genuinely care, they don't. Some 90% of the time they are just liking your posts because it's socially expected. It's silly.
Likewise these days it's so [dang] amusing to see the way people response to being 'deleted from Facebook'. It's hilarious. The amount of times I've heard (in a shocked voice) "OMG SHE DELETED ME FROM FACEBOOK!!!!!" - then this leads to the complete destruction of a friendship because apparently un-friending somebody on Facebook these days is the equivalent of beating them up in a dark alley.
Then the Facebook stalking - all the jealous ex girlfriends who spend every day (for the next 2 years) after a breakup stalking their ex's Facebook page to see if they are talking to other girls, etc. It's so pitiful that it makes me genuinely sad to see, because I have friends who engage in all of this kind of stuff and I just don't get it. Why would you want to be with somebody who doesn't want to be with you, and why would you let such a person have such an impact on your life?
Then there are those people who have a baby, and then every single day becomes a pictorial timeline, showing ever time their baby spills food on themselves, or grumbles, or drools, or falls over. For goodness sake. You have a baby and we're all happy for you - we don't need (or care) to know about every single event in that baby's life...save that for your family and your closest friends - the ones who will actually care.
I really don't care for telling everybody on my Facebook page every single thing I do in my days. In not not only do I not care, but I don't WANT everybody to know every thing I do. I don't WANT everyone to know exactly where I am at every moment of every day of my life. It's none of your [dang] business.
If something happens in my life that i want a select few people to know about, I will call them and tell them - it's called ACTUAL communication.
I think social media has it's good points, but like most things these days I think it gets overused and taken to the extreme, much like technology, political correctness (seen the ad for that new 'all female crew' Ghostbusters movie??) and sex (which now days has become the social equivalent of a peck on the cheek) and online dating (which seems to be almost completely replacing actual social dating).
The sad part is that I'm not even old, I'm 31 years so I was in my early to mid 20's when all this was being introduced.. I've been working in IT for some 8 years too so I'm certainly no technophobe. Yet I still think that all of this is kinda ridiculous.
Forum discussions are probably the closest thing to 'social media' that I frequently engage in, because I think it's pretty cool to be able to discuss common interests with people all over the world. The rest of it, I could do without.
Hell I could delete my Facebook account tomorrow and never look back.