I appreciate your perspective, but I thoroughly disagree. Silence is always the worst response: it signals that you aren't even worth the courtesy to be responded to. I'll take a borderline-personally-insulting response over silence any day of the week. That gives me the ability to analyze the responder's thinking (after I'm over the hit to my ego) and see whether I believe the responder has a point or not.
I agree. I've only heard silence applying twice. Yet all the YC messaging is "apply again!" I'm curious if they ever consider the people who have heard nothing from them for a decade, when they talk about why you should apply.