That's the nice thing about lists. The government says you're on it, and that's that. No proof required. No means to defend yourself or prove your innocence. Nope, you're on the list, and now we're going to bully everyone and cut you out of all the conveniences of modern life. Those who don't co-operate, well, you wouldn't want to be "aiding a terrorist" now would you?
The "free" world has gone insane, and I despair when I see a whole new generation growing up that doesn't seem to have a problem at all with this modus operandi.