Are you annoyed that annoying tourists others continue to stand in the Metrorail car doors during rush hour? Do you want them to know the door hogs are a public egress hazard?

How about this idea from Life Outta Context? To quote ’em:

Borrowing from New York’s plan to reduce intersection gridlock, the Metro should institute a “Don’t Block the Box” campaign.

Mark off subway car exits in bright and bold yellow. Give the announcer a new script that includes the admonishment DON’T BLOCK THE BOX said in her best uncompromising tone (more like your middle school vice principal).

Amen, brother. Play on drummer!