I'm not sure about top-post zapping as a form of conformity. I tell myself that if I happen to get a front-page post, it gets zapped because people became aware, read and then appreciated my post. Yes, I guess that I'm that naive, haha.

Either way, in the spirit of being the delusion you want to have, I mostly zap non front-page posts: more in recent and what I get alerted about in notifications from stackers I subscribe to. And the majority is comments.