I want to ask if the sentence "Мусоропровод забит жильцами" is completely ungrammatical (and why). As I know, we can surely say: "Стихотворение написано поэтом", "Роль сыграна актёром", "Очаг возгорания потушен пожарными" and so on. The structure is as follows: inanimate noun in nominative + passive voice participle (past tense, short form) + animate noun in instrumental.
It's totally grammatical, in theory ambiguous but however on practice, since it's way more common to see a rubbish chute ruined by people rather than a rubbish suite filled up with human beings - this disambiguation is virtually negligible.
Context is important. Compare following text snippets:
- Полянка была замусорена студентами.
- Лужайка была завалена полуразложившимися зомби.
In first case one rather assume that students littered the lawn, in the second case (however artificial this sentence is) one would imagine rotten corpses as semi-moribund zombies rather than, you know, zombies engaged in some sort of throwing contest.