I hear you but they don't need to do that. The restriction is already in place. You are supposed to be fit for your flight.

When I used to do my two leg commute for RP I had to have a backup flight for each leg. So with a show time of say 2PM in STL I still would get up 4:30AM to get on a 6AM Delta to ATL, then to STL or else I would have not made it. Then fly until 11PM, or later when delayed. There is absolutely no doubt in my mind that the FAA would have been all over me about why I have spent some 20 hours in airplanes/airports that day. The burden to prove that I was fit for my trip would have been on me. BTW real though to prove that when the TSA camera shows you walking through the checkpoint at 5:15AM half way across the country. In addition it is the law that a company scheduled deadhead, and the usual 30-45min prior the departure time of that DH is not considered rest. From there it only takes one step to prove that indeed my commute can't be considered rest although it is not forbidden. And we all know that it is true. It is no rest and you feel like crap on that first day.

Having said all that, I agree, this may have an outcome that will make commuting even more miserable. I don't expect anything good coming out of this. A 2 leg commute + a crappy regional schedule + commutable trips = playing with fire.