facts. euphemistic BOLTz, Lnurl-with-bolt11 swaps, even subtle giftswap routes via mempool rbf... bury on-chain history into the lightning void.
bonus: run Vector on top, all your DMs, voice msgs and file uploads are end-to-end MLS-over-Giftwrap anyway, so your swap recipients *and* your notes stay shielded. blinded-forward those onion packets too,free both coin and comms.