Why is the identification of a person such a big deal though? In the first place, isn't anonymity(to a certain extent) one of the best features of bitcoin? Whereas you wouldn't need to have an email address, an account, or whatever kind of validation for you to have a wallet and use it? Customer identification being unaffiliated with their wallets isn't a weakness. It's actually one of the strengths of bitcoin.
I dont think that they can trace any user of blackchain unless he's using custom private key generated by himself/herself .
Bcoz new blockchain is using account system in which they suggest you to deposit money into a new generated address by blockchain and it will automatically gets credited into blockchain account.
So u cannot be traced after by using new address everytime.