If this is the also the case , doesn't that mean that the demand for virgin Bitcoins more valuable than the other BTC out in circulation and thus , the circulating supply should be different...?
We're told regularly that big dicks pay miners a premium for virgin coins. I'd be very curious to know if anyone will pay them a premium when the time comes to sell.
The only time a coin is guaranteed to be radioactive is if it comes directly from something crime related. Rest of the time it's not an issue. The coins I bought in 2013 will almost certainly have some Silk Road taint somewhere. Considering the amount supposedly stolen from Gox most people will have a bit of those too. Mine have gone through exchanges and payment processors just fine.
As soon as coins get turned away with a hint of nefarious activity 50 wallets back the whole thing falls apart. The moment virgin coins ride to the rescue someone'll infect the shit out of them. There'll always be direct taints and I'm fine with that but anything a few levels lower is unworkable.