I don't think it is classy for agents or editors to snark queries without prior permission, and I likewise don't think it is classy for authors to use whatever platform is available to them snark rejection letters either. These are personal pieces of correspondence.
May I interest you in...?
No, thank you.
Sour grapes should be consumed in private.
(And this is why most editors no longer give detail feedback, leaving the rest of us to just try and guess why they said no.)
p.s. All Romance Ebooks turns three today. Happy Anniversary.