I don't want to accept stolen bitcoin, but that's not a fungibility issue, that's a social issue.

premitive1

A $20 bill with the N-word written on it in big bold letters probably isn't likely to be accepted at a Walmart, but the bank will have to take it, because it is fungible currency. 

Similarly, regardless of how anyone feels about any particular set of sats, If a transaction is broadcast, and a fee is paid, the bitcoin asset can be transacted across the Bitcoin network to a bitcoin address, because it is entirely fungible.  

skreep_

Would you accept sats knowing they were used by criminals or traffickers?. Knowing where they come from using an open ledger makes the difference for some people. Note I don't mind or care.