lightning rod

/L AY1 T N IH0 NG R AA1 D/
noun
  1. 1

    A metallic conductor that is attached to a high point of a building and leads to the ground to protect the building from damage by lightning

  2. 2

    A person or thing that is a target for negative reactions and distracts criticism from another target.

Source: https://en.wiktionary.org/wiki/lightning%20rod