This, unfortunately, happens more and more: Bitcoin's fungibility is under attack:
I've seen several posts lately from people willing to treat Bitcoin as non-fungible because they believe some coins are "tainted".
I'd say this is a severe threat to Bitcoin, and I wouldn't be surprised if governments use this because they can't stop Bitcoin in any other way. If people believe Bitcoin is "tainted", they won't accept it anymore. "We" should really inform people not to fall for this.
Nobody would reject a dollar bill because it has previously been used in a crime, despite the fact that
85 to 90% contains traces of cocaine. Claiming Bitcoin isn't fungible is just plain stupid.
's naming and shaming. Unfortunately, the list is far from complete. And growing.