A "modicum" of sanitary practices doesn't include something as innocuous as using some breath condensation to open a bag lol. Say that to the parents not watching as their kid snots all over the place. If you wanna call someone a troglodyte, maybe reserve it for the guy who sneezes without covering. The level of harm someone does by selecting their produce, tearing off a bag, and God forbid breathing on their hands is actually nil.