I was going to mention Congressman Brad Sherman but you beat me to it right at the end there.
The funny thing about "banning cryptocurrency" is that they would do it the same way that they banned online poker: Make it illegal for the banks to process the transactions.
This would create a black market because demand for crypto would raise even higher if it's outlawed. More citizens would start buying mining equipment. More citizens would start paying cash for crypto off the books.
Once a decentralized way to turn fiat into crypto comes around a ban such as this would be laughable. In fact, it's already laughable because big corporations like Coinbase (Goldman-Sachs, Facebook, Amazon, Cisco, etc.) are already committed and forming political action committees in crypto's favor.
Did they learn zero lessons from trying to crack down on people using Pirate Bay to 'steal' IP? You can fine a bank for millions; you can't fine a person for millions; they don't have it. I guess those fools are going to learn all the same lessons the hard way. Seems like a good sign for us that they are incompetent dinosaurs.