It's probably an unsolvable paradox, since nobody is impartial: who is intolerant and who is fair-minded? If we object to "trolls" voicing dissenting viewpoints, however crude, does that make us just as intolerant as the "trolls"? If a "troll" says something we don't want to hear, and we gang up on him and call him a "troll", then are we descending into a "group-think", mob-rule situation? I suppose as long as we dismiss dissenters as intolerant "trolls", we still have a long way to go in the evolution of our societies.