It seems that many people on that list are prevented from flying on commercial airplanes:
http://tinyurl.com/36n9t9

The list is just that, a watch list of people who the government thinks are prone to commit terrorist acts based on their ideologies. Like most government activities, the identification of peoples’ predispositions is dreadful and the definition of terrorist predisposition is severely ambiguous. The range of ideologies include a very small minority of militant muslims among us, who may be a danger to the general public, and a vast majority of political activists, who are only a danger to the kleptocrats in charge. Ron Paul activists, watch your backs.

I cannot attest firsthand the disadvantages of being on a watch list, but I have heard that people have been denied being able to board airplanes and do anything else that now requires government permission to do.

Does anyone know what happens to folks who get their names put on a watch list?

Then, you’d have to look at whether that injury is impermissible under federal law.

I don’t believe it’s 900,000. And this number may reflect the politization process.

On the other hand, a watch list has to include more people than only terrorists because the government does not have perfect knowledge.

This whole issue depends on whether you regard this as a war against a real enemy, or whether you regard this as a tiny group of criminals. The proper way to prosecute a war is not the same as the proper way to prosecute a criminal.