It is common courtesy to put trash in the trash can and when people don't do that it often results in a build up of garbage which can be very frustrating for those who have to clean it up
Consider the statement "MY neighbors are always leaving trash on our stairwell.". Based on this "I am so pissed off about the fact that my neighbors never put their trash in the trash can and it piles up on our stairwell" a true statement? Yes, no, or I don't know?