How do you beet ticket checks on the subway?

I've heard of a guy who never buys tickets for the subway and has not been caught for 5 years.  How does he beet the system?  Granted, his clue is that he only uses the subway when it's overcrowded or very early in the morning or late at night.

he is roboat

Robot.

just do it. ive never paid for the light rail, and its been almost 5 years, but i have to say that security is really non existant