i hate it when those alighting passengers walk slow slow.....
and they are young ppl......
Really? I always overtake at least seven people when I go down
the stairs to the concourse (yes, I use the stairs - I avoid
downward escalators as much as possible), and I'm 14. 
What really amazes me is how poorly the "stand on the left" rule
is enforced on escalators. People in other countries seem to
understand that flawlessly. Singapore? NO ONE DOES. It especially
pisses me off, and it's caused me to miss a train on at least five
occasions.
C'mon, is it that hard to move a step to the left?