vegetarian and all.
Then there are all you religious fanatics like Quakers and Catholics. And what about those birders and whale watchers? I mean they are always looking through binoculars, like that's not suspicious.
Consider university professors. They keep teaching people, sharing ideas, and using phrases like "academic freedom." Damned subversive, that is. Don't forget those centers of terrorist thought, libraries.
The truth is, if you have even done anything remotely intelligent or showed signs of having a social conscious the FBI considers you a security threat. It doesn't matter if you are a pacifist or a child, the FBI is scared shitless of you.