Although I disagree with Taboo, what seems to be his philosophy isn't unlike that of many others. Sure, he's more open about it, but at the end of the day, what are a number of people who watch this video going to do? Yes, it increases awareness, but so what? Everyone in the world can be aware of something, but that doesn't mean anything will change. Many probably won't even remember this until it makes it into the mainstream news a few weeks from now and even then it is a long shot they will be anymore mindful to it. Taboo simply decides to exist in the world he immediately experiences, instead of being a bystander to a larger spectrum every once in a while to say "How sad" and then continue on. And as long as he doesn't try to be hip and edgy about it, there isn't anything wrong with that view.
In fact, it can be a very good way to live, considering it enables you to concentrate more on your community, which in turn gives to those around it, which gives to those around them, and eventually to the world. Peace within levels, I suppose....
That being said, it is also important to acknowledge the existence of other human beings and their ability to feel, even those you may never see. Empathy is essential to living, after all. Otherwise, much of what you said is perfectly valid as well. It boils down to a matter of opinion, really....