Often a stereotype stems from a lack of understanding, so if calling one out is for the purpose of fostering understanding I say go for it. As to how, certainly each person will have their own strength as to how. Consider your audience, the one you are trying to 'enlighten' may well require a different approach. Ultimately if one feels strongly about 'the need for a smack down' then they should, in terms of self authenticity. The person being 'smacked' will let you know if your delivery was well received. :-)
I really wanted to add a thought to the offering about your inconsistencies post, since these are related, will take the opportunity to add... When it comes to taking a stance on one side of a situation, one should not be afraid to LISTEN to both arguments. Knowing what the other side thinks should make ones own position stronger, or at least see another point of view. Just my opinion on that, and as always more could be said on it. Ha, Ha.