That user doesn't speak for me; my time is not so valuable today, which is why I thought to spend some of it casually chatting about a social media website I never had any intention of using. It was never my intention to shame you, nor to deny your right to shame others. If you feel as though I've tried to shame you, then I apologize for the miscommunication.

So back to my question: "What would shaming them for this accomplish? Is the idea to shame them so much that they pretend to like ugly people like me? What would be the point of that?"

What effect on their behavior do you hope to accomplish by shaming pretty people for not wanting to hang out with ugly people? I'm not seeing a productive reason to do this.

That only works on people who aren't shameless and are willing to reevaluate their own behavior based on external criticism. Sometimes you have to pick your battles.