I think banning vpns like several borderline dictatorships have is still a little far fetched. This would have a negative impact on companies who use them who are the ones that tell congress what to do. Although they could always make it so that large corporations can get certain exceptions and legally using a vpn is just a matter of how much money they fork over to the fcc for a license or something.
It’s currently illegal to transmit encrypted data over most non-2.4Ghz radio frequencies unless you’re a telecommunication company. No one even cares enough to get mad about this. I imagine they’d eventually reuse whatever playbook they used to accomplish this.