Three hundred million people use it daily, so it simply
must be awful. How dare anything become popular because it connects people.
Yes, it's "viral", but it must be by nature to work a damn. I'm not a huge user, but apart from the danger it may pose to impressionable young kids (a problem endemic to the internet itself under certain circumstances), I don't see any real problem in it.
Besides, it's the only real way I have of keeping up with real friends of mine that reside all over the world - and for that it's absolute gold. I've never lost total contact with any of them.