Mysterious Packages

I had a package in my mailbox
from Alaska
at the University.

Inside was a small keychain
with these glittery words:

"People who act like they know eveything
annoy those of us who do."

***

That same afternoon, I stopped at a subway
downtown to pick up a six-inch spicy Italian on wheat.
When I exited the building I noticed a strange character
standing beside my Neon.

He was acting suspcious and I wondered if I had locked the doors.

Obviously, he didn't see me crossing the street,
coming directly toward him,
because, after looking up and down the street,
he reached into a trash can
and picked up a styrofoam lunch container
and quickly tucked under his jacket.

Drug deal was my first thought;
poverty was my second.

How might you interpret this scene?
And more importantly, why?