飞蛾赴火

Explanation: The same as the moths into a flame. Metaphors find their own dead-end, self-defeating. 　　Usage: Verb-object type; as predicate, adverbial, attributive; containing derogatory 　　Source: "Liang Shu to irrigate Biography": "If the moths of the visit fire, the flames can be stingy Qi." Thesaurus:  Tiger-moth Firefighting, a moth darting into a flame