I am talking about communicating with nocoiners and precoiners who are using "kyc" framing, not the mechanics of chain surveillance, but you make a great point. 

Please meme how you want. I will continue to be a karen on twitter and reject "kyc and kycfree" framing in the trenches. 

joerodgers

Let's say I am sending you now 1000 sats to whatever LN address you want.
Please find the UTXO I received from a KYC exchange 7 years ago and I use it to refill my SN account.

Are those sats "non-ethical"? How can you differentiate them from others?
YOU CAN'T. There's no way to find back that UTXO. Nobody can do that.
If you will be able to differentiate them, then Bitcoin will be dead. Right now dead.