"If you spend your time raging at the weakest arguments, or your most hysterical opponents, expect your own intellect to suffer. The intellect is a muscle; it must be exercised." [The Atlantic]
Then again, it can be hard to have an honest argument with suckers who insist on flinging poo or picking at petty semantics. Don't argue with those trolls. Delete them. Other than that, build your intellectual muscles like the mightiest Gawker of the seven seas, Hamilton Nolan.