[iamnothere]

I like this idea, although I fear that people would simply select whatever comes closest to "This comment provides inaccurate information" to express their disagreement.

People have an increasing tendency to view those with opposing moral positions as not just wrong morally, but also wrong factually, despite there being no facts involved in the discussion. (Attempts to explain the is-ought gap typically don't change minds, at least not in the short term.)