Great points! You perfectly summed up all top-of-mind issues with this idea. All of this was running through my head as I was cobbling together this shoddy landing page.

(Btw, I just posted the question on Ask HN, is it ok if I reply there? - I thought the idea was so strikingly stupid that no one would care)

Anyway, I have some thoughts about the problems you laid out. I will post a reply on the ask HN thread - and would love to get your thoughts!