Conscious or subconscious, to:
1. Use your wit/intelligence/insight
2. Communicate your values/conviction
3. Engage in collective activity/be in an in-group
4. Vent!
None of these in the appropriate degree or circumstance are bad things. But, unfortunately snark also is counterproductive to having vulnerable conversations with people. And therein lies the rub: most people do really want that, but because diving in to the lion’s den with your fuzzy lambswool on is a wild move, it’s easier to put on your lion-skin and go snark mode. People would likely be more fulfilled participating in spaces where they can be sincere and mutually respectful. But often they either don’t know where to look, or they’re entrenched with the band-aid validation they’re getting from their snark zones.