I received a SPAM/Phishing/Blackmail email demanding payment to a specific Bitcoin wallet.

BTC: 15vUqauqHybEPvXYLv97WW4XwM2YHXYC1d

How can this criminal be shutdown?

If legal action is problematic, could a "User Rating/Classification" be added to BTC Wallets so that it's possible to "tag" Bitcoin users who are using this technology for illegal purposes?

EDIT (evening of 20181121)

BitCoin Address Transactions for Wallet 15vUqauqHybEPvXYLv97WW4XwM2YHXYC1d

         |  Number of   |
         |   Receive    |
Date     | Transactions |
-------------------------
20181116 |         5    |
20181117 |         4    |
20181118 |         7    |
20181119 |        11    |
20181120 |         3    |
20181121 |         2    |

1.32229795 BTC scammed so far.

On 20181119 everything was transferred to BTC Wallet 38b3k1qkYDQDxX7FTZ14UtioemUmvH6Wfv. This wallet then showed receiving two transactions for the sum of 3.78129807 BTC.

On 20181120 small transactions to the origin wallet continued.