courtesy custodian 

The act of cleaning one's own mess (especially concerning personal hygiene) made in a public place, such as cleaning your hair out of the community shower or wiping "sprinkle" off the toilet seat, simply out of courtesy for the rest of the general public who have to use the utility after you.

Sharon always courtesy custodians her toothpaste out of the sink when she's living in the dorms.

I went to use the bathroom the other day to find a pube on the seat; people really need to learn how to courtesy custodian.

courtesy custodian by The offended January 16, 2008