Playing Stopwatch on Aircraft

During my school days (& sometimes in college too),we used to play with the stopwatch feature that was available in digital watches. It was a game played to kick off boredom,that involved stopping the 100th of a second display precisely at "00".

Just thought how people would react if someone played that game on a aircraft in today's paranoid filled world.Today anyone who can make passengers feel uncomfortable unintentionally with his clothes or beard are susceptible to be offloaded if the passengers feel so in the western world.More so,if the person happens to be a Arab/Asian.

So a game on the stopwatch with some beeps and running counter will count as "setting a bomb" in the minds of paranoia mania filled passengers and he will be arrested!