But also — why are you doing them any courtesies? Clearly the other person hasn't spent any time on the email they sent you. Don't waste time with a response - just archive the email and move on with your life.
That'd be nice! But that's not how it works. I can't just ignore a response. The project still needs to move forward, but if they've successfully mimicked a "response" - even an unhelpful once - it's now my duty to respond or I'm the one holding things up.
I'm sure someone out there is using them in a way that helps, but I haven't seen it yet in the wild.