It's the same way on every board. So many people are scrambling to fit in anywhere. Either by trolling, or pretending to really care about things that don't actually matter to them that much (both of these types can most easily be observed in platform war arguments on /v/). Everyone is so empty now. I believe the difference is the lack of innocence. It's not honest and light stupidity, it's the constant need for attention and validation, and the intentional desire to drop everything for it. People are pushing harder than ever before to fit in to any group. This is why the topic of a board is important. It gathers a natural community around a mutual point of interest. Something to actually talk about, instead of just a bunch of people sitting around with nothing to talk about, which leads to pointless drama.
It helps that in the past, /b/ served a purpose. Its where topics that couldn't really fit anywhere else were posted. Think of it like the stupid questions thread here on /g/, but more goofy. Now people just post random things all over 4chan because, for some reason, they think they can't visit different boards.