Several people on this thread, and you are one of them, have little ability to make distinctions or to understand subleties of difference.
I have NEVER suggested that we ignore suspicious behavior. Quite the contrary. In several posts on this thread I have tried to make quite clear that we should all be careful and alert and report suspicious behavior to the authorities. Yet I am continually attacked as if I had been saying just the opposite.
What I have said, and still say is that once a person has made his or her suspicions known to authorities, the authorities have the job of investigating and making a determination. You and others seem to beleive that someone's allegation of "suspicious" behavior should be sufficient reason to detain and lock up people forwho knows how long. That is unreasonable and unworkable.
Similarly, there have been some, although I don't know if you fall into thai category that are calling for vigilante action against people who act suspicious in the vigilante's mind. What's wrong with that is that it is also unfeasible and unworkable. Worse, anyone pulling a stunt like this on an aircraft would be sued by his victim and prosecuted by the state, and righfully so. What kind of irresponsible person would encourage someone to commit unjustified battery on another? I know emotions run high over this issue, but we are supposed to be sane adults.
Right here is where I want to clear the air about direct action. Once there is a hijacking in progress, of course people can and should take matters into their own hands. But that has never been the thrust of the discussion on this thread. What has been proposed here is preemptive action against "towelheads", "ragheads" etc. acting suspiciously.
If you are aligning yourself withg that position, then God help you.
Reporting suspicious activity is NOT vigilante action. If you think so, YOU are stupid.