For me, it's a matter of setting the record straight. I have a strong sense of justice and when I see nonsense peddled by "authority" figures, I feel it's my duty to correct the falsehood and free my fellow man from the chains of deception.
Because if I didn't all I end up looking at is a mess of threads designed to enjoy the relationship with a whole bunch of people I've never met, never likely to meet and unlikely to be thought well of after this post.
Give me substance..I don't care if it's controversial. Let others worry and constipate themselves with concern. I'd rather whip on a pair of gloves and go delving. Who knows, I occasionally find real gems of thinking... Of course most often you have to get past the eyesores of internet anonymity first but we all signed up for that right?