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Blond Guys Are Evil and Blondes Are Evil have been disambiguated because of misuse. "Villains who are blond" isn't a trope, but Administrivia/PeopleSitOnChairs. We do have:

* AlphaBitch: Bitchy leaders of high school cliques are often blonde.
* FaceOfAnAngelMindOfADemon: The villain's angelic appearance, which can include having blond hair, contrasts with their wicked nature.
* HairOfGoldHeartOfGold: When the "blonde = pure and innocent" trope is {{exploited|Trope}}.
* DelinquentHair: Hair styles for outlaws or people who act rebellious, which can be dyed blond.
* LightIsNotGood: A character associated with the light, perhaps by having blond hair, is truly evil.
* ThoseWackyNazis: Nazis can be blond in addition to evil.

Please correct any wick to refer to the correct trope if they fit the definition.