Because most of that "drivel" is well intentioned fun/joking around/trying to make other users kersnortle. What Mario is doing is plain old spammer/trolling and apparently, as he admitted in this thread, trying to "expose" us as "frauds". As sharke has pointed out he seems to do it on other sites as well.
It is mean spirited and/or specifically intended to waste the time of other users in a disengenuous manner. It's not intended to be funny or interesting. It is intended to annoy and disrupt.
I look at the CH like the "smoke break" room at band practice. Someplace to take a breather from the toons or whatever and goof around/chat with your compatriates. I notice that the most of the doods/doodettes that "get" the CH vibe have spent a lot of time in bands/bandrooms.
Also... I gotta say you get cranky about the weirdest things, dood.
'sup wit that?