How can I block referral traffic from spy sites?

In the Analytics section, Shopify lists the sitest that send traffic to the store.

How can I block traffic coming from specific spy sites?

From what I understand, each visitor has a different IP address, so blocking by IP isn’t good for me in this case.

Since Shopify has this list, can it be tapped into in order to block this traffic?

I’ve got the same problem. Did you ever end up finding a solution?

Same question over here.