Foundling

What doesn't go in the bin
Causes delay on the track
Please keep on shoving it in
'Til it comes out of the back;
Turn it around then and thrust
All of it back through once more.
Filling the bins is a must;
Emptying them is chore.
All that we ask is you try
As we are trying, to keep
Tube stations clean so that I
Don't have to come through and sweep.
Heap all the trash in that pile
I've been on break for a while.