> Good luck tracing that Subpoena the trading sites? An active adversary would be running the trading sites, though I doubt they'd waste that info on a low-lev

> Good luck tracing that Subpoena the trading sites? An active adversary would be running the trading sites, though I doubt they'd waste that info on a low-level case. LocalBitcoins says they retain all messages for 180 days, up from their previous 90. Is that purely for internal disputes? Sure, if you're not doing anything illegal enough, you can get away with simply using sites in multiple jurisdictions and hoping it's too much of a pain. But let's not pretend it's not traceable. I'd only be happy with zero knowledge proofs (if they're real; I haven't understood the maths at all.)