An addition to my How not to promote post from a week ago: If you find yourself getting upset on the Amazon boards, don't start cussing out readers and insulting everyone in sight.
And yes, once again, you would think this would be obvious to any writer. But apparently it's not. I don't know if certain authors think their only way of generating sales is controversy, or if they're just socially inept. But it doesn't do any favors for the rest of us.