Quite right, if we continue to "evacute" (in both senses of the word) every time someone sees a paper bag in an airport, the cumulative economic effect will be a terrorist win every bit as much as a real attack.
First we have an appeasement/apathy problem, now we have a paranoia problem.
Checking watches is called boredom/impatience, people. Not "I'm going to kill us all in a fiery explosion." If I get in trouble everytime I check my watch, I'd be arrested, processed, and interrogated every day.
Fun.