You should ask these guys:

https://www.chainalysis.com

It's what many exchanges are using. Apparently they are busting $millions worth of BTC coming from "criminal activity". Binance is the latest exchange to be using this.

Using BTC on exchanges is getting increasingly risky. Forget about this criminal bullshit, for us regular users, it's still a risk to put your money into what is basically a lottery of your coins having or not "criminal activity" linked to them. BTC needs to get the fungible part improved if you want to deal with fiat frontends.