[Caipirabob]

As long as they don't bother me, just the little people...

[Prodigal Son]

Potentially suspicious behavior could include wearing heavy clothes on a hot day, sweating on a cool day, loitering in the terminal without luggage, or even using a pay phone.

Those pay phone users have always freaked me out.

[heleny]

The federal air marshals who travel undercover through Logan International Airport each day will ... scan the crowd for suspicious activity
...
Law enforcement officers who notice any irregular behavior are trained to then ask simple questions about their identity and look for an innocent explanation that could clear up any confusion.

If the air marshals themselves question the suspicious people, wouldn't that reveal that the air marshals are working undercover?

[KantianBurke]

"Law enforcement officers who notice any irregular behavior are trained to then ask simple questions about their identity and look for an innocent explanation that could clear up any confusion."

And if anyone comes up and starts asking questions and is given a quick response of "piss off" what happens then? You don't HAVE to answer any questions?

[freeeee]

Police state? What police state?

And vy are you using that payphone, comrade?