Questions & Answers about Не стоит оставлять посуду на балконе: ночью там холодно.
Не стоит оставлять… is a soft, advisory way to say it’s not worth / you shouldn’t (really) do it. It sounds like friendly advice based on common sense.
- Не надо оставлять… = don’t (do it), more direct (a request/command or strong recommendation).
- Нельзя оставлять… = it’s forbidden / you can’t, about rules or impossibility.
So не стоит is often the most tactful option.
Оставлять (imperfective) fits general advice about a repeated/habitual action: Don’t leave dishes on the balcony (as a practice).
Оставить (perfective) would point to a single, specific act: Don’t leave (them) on the balcony (this time / tonight).
Both are possible, but the imperfective matches the “general rule” feel of не стоит.