Security or paranoia?

Here is an example of why it’s not a good idea to keep telling people, “look out for anything suspicious while you are flying.”:

A Frontier Airlines passenger on a flight from Denver who had a notebook that contained the words “suicide bomber” was taken into custody Wednesday and questioned for several hours before being released to his family, police said.

The suspect, identified only as a 36-year-old male residing in Santa Cruz County, got the attention of a fellow passenger after writing in a journal that had the words “suicide bomber” handwritten on the front, authorities from the San Jose Police Department and the FBI said. He was also clutching a backpack in what the fellow passenger regarded as a suspicious manner.

The entire concept of reporting suspicious behavior is making people paranoid. Now, if you are eccentric, you have a good chance of having to explain to law enforcement why you aren’t a terrorist. Does anyone think this is a good thing?