Siren Song Meaning

(idiomatic) An enticing but dangerous appeal, especially a misleading one.

Example: 1914, Jack London, "The Sea Farmer" in The Strength of the Strong:
  Romance never sang to him her siren song, and Adventure had never shouted in his sluggish blood.
2009 March 26, Michael Elliott, "Global Trade: The Road to Ruin," Time:
  Said World Bank president Robert Zoellick: "Leaders must not heed the siren song of protectionist fixes. Economic isolationism can lead to a negative spiral of events."