You could let the users rise some doubts on the last driver of the abandoned car by giving some low profile hints.
In example you could describe what was found inside the car, in detail, and highlighting some object that is in contrast with what the thought last driver was .
To be more explicit, you could describe a women perfume bowl ( that seems used little time ago ) while the intended driver was a male.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence