I am curious as to why you feel the need to used create derogatory labels to distance yourself from people who have found themselves wandering down darker alleys in life, as if you are somehow superior either morally or in a survivalist sense, which especially isn't the case if you partake in any action sports (considering that you don't know who Doug Coombs is, I assume you're not big into skiing).
I don't really care if you don't give a shit that he is dead, or that you were unaffected by his presence in the arts (after all, you have no obligation to) - hell, I'd say this is less about Hoffman and more about your underdeveloped and simplistic outlook on life. Maybe when you leave your little idealistic 20's-bubble and get a dose of the real world, you'll see how precarious life really is, either by acts of nature or the search for peace from our demons through our own self-destructive acts. I don't blame anyone for wanting to see the world in black and white, but don't get all self-righteous over the fact that deep down, you're too much of a coward to acknowledge the human condition for what it is and instead take solace in dismissive labels and condescending chest beating. I can name too many great people who died with needles in their arms who were ten times the man you'll ever be as long as you maintain that shit attitude. I don't understand why people are getting pissed at you; I just feel sorry for you.
P.S. anyone who doesn't at least acknowledge Hoffman's skills as an actor loses all credibility. Go watch Synecdoche, New York, you fucking philistines.