I was wondering---Suppose you are hit by ransonware and pay the fine to a bitcoin address. If you can identify an exchange or service that receives the bitcoins next, is the exchange then liable for facilitating the crime under various anti-money laundering laws and KYC laws.

Also could adnetworks that fail to block a ransomware ad be held liable?

I assume at some point the bitcoin you send the pirate goes to some exchange or mixing service. Have some people figured out how to link various exchanges and services with bitcoin addresses? I have seen somethings that suggest to some extent "yes".