[bagacrap]

So it's up to the individual to make sure they're not accepting dirty money. Shouldn't be hard to write software to accomplish that. The exchanges can do it --- flag incoming dirty money. Average users don't accept btc from strangers as a payment for goods or services anyway.

[trompetenaccoun]

Yes, but for example when you use a tumbler (mixer) the whole idea is to receive random coins back. Also you can not rely on everyone to know and care about this. And not all dirty money is publicly known anyway. So there will always be ways to get rid of dirty BTC.

The non-fungibility of bitcoins can be seen as an advantage or one of its largest flaws, depending on how you look at it. Either way it's the reason quite a few people have switched to Monero and other completely fungible coins.

>Shouldn't be hard to write software to accomplish that

There are startups offering exactly this as a service already.