People who block Metro's escalators

http://www.washingtonian.com/blogs/capitalcomment/washingtonian-word/theres-a-word-for-the-people-who-block-the-metro-escalator.php

For those of you who visit DC, I will give two bits of advice when it comes to the subway system here:

1.  We never call it the subway, it is Metro.
2.  If you block the escalator's left hand side, we will murder you.  Quickly.  And there's not a court in the region who will consider it anything other than "self defense".  You won't be warned again...