I would agree that there is probably no way any even remotely reasonable interpretation of the bill would be as bad as what the GOA is describing, but I have observed over the years that it is very unwise to expect the government to interpret laws in even remotely reasonable fashion.
If the provisions for putting people on the "prohibited" list are pushed as hard as possible so as to add as many people as possible, while the government does all it can to ignore the provisions for appealing such placement, would you still think it a good law? Particularly if the government didn't feel limited by what the statute actually said?
I don't care what the bill actually says. What matters is what the government is going to pretend that it says. And experience tells me that while the GOA's predictions on such things may sometimes seem pretty far 'out there', the government's actions are often even more so.