Yes, it is the fact that some users from darknet are using bitcoin for their illegal activities and that’s the matter of worry for us. We should find some solution for this issue because ultimately it is damaging the image and goodwill of bitcoin. Governments will have concrete reason to impose ban of the whole bitcoin in their territories so we shouldn’t stay refrain from such activities and must find some practical solution for such issues.
All transactions are recorded on a public ledger, all anyone has to do is link the bitcoin address to a person and since most people buy their coins via an exchange their details are available on request to the authorities.