Yeah, because tax evaders and money launderers are all fucking retarded.
So, so dumb that they broadcast their illegal activities on their clear without recourse to Tor or I2P.
I hear that's how Alexandre Cazes of Alphabay bought his Lambo Aventador.
Moved his XMR straight from Alphabay and into a Poloniex account registered under his real name! $900k. Just like that! Easy peasy.