(Oh boy... Looks like I struck a nerve with a few people. -_-)
What exactly are you trying to say? Are you trying to deny the impact that Facebook has had upon this world because you think it's a cesspool for useless blather? You may not find it particularly useful, but it would not be an exaggeration to say that it has been an innovation that has changed the world.
No doubt Facebook has changed the appearance of the world. Now I cant even buy a pack of underwear without the package saying: Like us on Facebook!
My point is this: Facebook is not that beneficial to society in my opinion. It leads to useless blather, to use your own words.
Greater connectivity, bringing people together, kicking off new initiatives from these new linkages. Facebook was used extensively during Arab Spring to organize people just to name one major usage.
The internet in its entirety was used to organize the Arab Spring, don't give Facebook all the credit. Don't get me wrong, Facebook does generate positive constructive results, but the "blather" and sheer pointlessness it also generates far outweigh the positive side of it.
To save you fine gentlemen the time and effort in changing my opinion, don't even try. I know every argument you're going to generate, and they wont have an effect.