Not In Your Job Description?

Okay people.  Didn't your mothers teach you anything?  When you take the last of anything, DO NOT LEAVE THE CARCASS MOLDERING FOR OTHERS TO DISPOSE OF!
Taking the last of anything and leaving the empty container is rude.  When asked the perpetrators are asked 'Why did you leave this garbage in the supply cabinet when there is a trash can next to it?' And their reply is 'It's not my job?'
SERIOUSLY!?!?!?!?!?!  What planet where they raised on?
It's not my job to play nurse maid to a bunch of supposed adults who should be able to pick up after themselves.  A word to the wise, it is EVERYBODY's job to contribute to a healthy environment.  If that means picking up after yourselves, so be it!
Lack of responsibility is a pet peeve of mine in the supply cabinet.  I expect a certain amount of maturity to be exhibited.  You take the last thing, you need to do the following:

1. Tell the person who maintains the supplies. (Yes, folks, that is ME!)
2. Throw away the empty containers. (This won't kill you, demote you, or demean you.)
3. Do not expect 1 & 2 to be done by others!

While this is not a difficult concept on paper, the actual application and implementation is apparently beyond the capabilities of mature adults who hold down jobs where multi-million dollar decisions are being made.
Or it could be I'm dealing with idiot savants.