Of course the article said nothing of the actions or behavior of the "students" that raised suspicion with the flight crew. You know students of any flavor would NEVER do anything to draw attention to themselves.
I don't fault the flight crew for the call for more screening -- or the TSA/LEOs for conducting the screening in this instance. What I do fault, is the airline causing the remaining passengers a delay as a result. The questionable passengers should have been removed for further screening and the flight should have continued to the destination on schedule with the remaining passengers aboard.
Once again, all passengers had to suffer because of the actions of a few...