Calling somebody's work "bullshit" is about on the same level as name-calling, even if your criticism is totally legitimate. In general "it's true" doesn't really make sense as a defense for incendiary words. So I don't think it's unreasonable to say your headline is in some way trolling. Of course, it's hard to blame somebody if the thing they're replying to is dramatic enough, but I just don't think bad journalism on a tax article (giving you the benefit of the doubt - I don't know who's right) meets that bar here. There's enough noise in the journalist-hate genre that it's already a job filtering it down to the reasonable critiques.