Why wouldn't he be serious? As more and more people spew forth garbage onto the Internet, we just end up wasting more and more of each others' time. For god sakes, look at Twitter! Maybe there's some useful information in there sometimes, but for the most part it is pure noise -- and look how it's taking off! It's as if people would rather waste time both creating and consuming fluff than to spend the time to create and consume content that is actually worth something.
Broadcasting something to an undefined group of people doesn't really count as social interaction in my book. Even if it did, I'd consider it a pretty lazy and meaningless method thereof.
Your characterization of online social interaction is plain wrong. You can't assume everyone else approaches Twitter or Facebook the same way you might. People learn from each other online, argue with each other, start relationships, start/run businesses, share photos and videos, etc. I have no idea how you can overlook all the positive things to promote such a negative view.
