Offensive is just the icing on the cake. The point is to look at the actions, not the entity in question - to avoid *fallacy*, not offense. (Besides, you can't avoid offense. The trick is to avoid being *unintentionally* offensive.)

I think Tom has it right. Saying "LIAR" or even "childish" without citation crosses the line.

Truthfully, the metafallacy here is negativity; it's precisely what Keith was referring to. The individual in question is demonizing Fox News. What we want to do is accentuate the positive.

Peace and Love and Liberty... and Music. -- Bob Marley

(Now, *there's* a tag line.)