It's inconsiderate to leave your waste in a public toilet.
Mark is shopping at the grocery store, and he stops to use the toilet, but afterward he finds that the toilet will not flush.
Mark wants to leave the restroom and continue shopping.
Mark holds the toilet handle down for a few minutes until the toilet flushes.
Mark leaves his waste in the toilet and leaves the bathroom to continue his shopping.
The janitor who cleans the restroom will not have a difficult time cleaning up at the end of the day.
The janitor who cleans the restroom will have to deal with waste that has been sitting in the toilet.