The NG compressor is prohibitively expensive... for now.
As for “what’s to stop you”, I imagine they will enact some fines & jail time for avoiding the fuel tax for your car by bypassing the vehicle usage meter.
I see this as parallel to off-road diesel usage.
Some big fines await if they catch you using the “red” diesel in your car.
Yup, but I don't think they are going to be useing dye on NG. Like I said at the beginning, IMO the fly in the ointment is the pols figuring out HOW to tax it. My guess it will be a per mile tax on ALL vehicles...who knows...
IIRC, in the first segment Santelli said that the home compressor is safe and NOT cost prohibitive.