It will at some point reach the stage where if you aren't on a watch list you aren't being a very active participant in the steering of society: You don't talk about real issues because you either don't care or are too afraid to, you don't exercise your rights and are too afraid to associate with anyone who does, you go out of your way to be part of the status quo and do whatever you're told, your opinions will be handed to you by Fox News, and someone will be checking you share them on your Facebook.
It's not really a question of being on a watch list. The FBI always had questionable ethics when it comes to who they watch, e.g. Martin Luthor King, John Lennon, etc. The problem now is that it is out in the open, and no one is complaining. It used to be a scandal when the government did something wrong. Now no one seems to care.