A hanyoyi da yawa, abin da ke ƙunshi unguwan "mummunan" yana cikin idon mai kallo. Alal misali, wasu suna jin tsoro, tashin hankali da kuma zirga-zirga a yankunan da ke da yawa, da kuma ƙananan bayyane. Akwai sauran daidaitattun da za a yi amfani dasu lokacin da aka gano wani unguwa marar kyau wanda bai taɓa kasa ba.
Tsaro ya kamata ya kasance mai matuƙar damuwa ga kowane mazaunin Jacksonville. Ba a yi nazari da yawa ba don ƙayyade yawan laifuka, amma akwai wasu.
A shekara ta 2010, First Coast News ya fara gano Jacksonville, mafi yawan haɗari, da kuma nazarin bayanan da aka tattara daga JSO.
Bisa ga sakamakon binciken su, yankin da ya fi hatsari a Jacksonville yana kan Jacksonville ta arewa maso gabashin, kusa da kashi 1000 na Sarakuna Rd. Wannan yanki kusa da Kwalejin Edward Waters.
Wata binciken da aka kwatanta yankunan da ya fi hatsari a Amurka sun sami sakamako daban-daban. A cewar binciken DailyFinance.com, yankin tsakanin Broad St. da Beaver St. (tsakanin Jacksonville da cikin gari da Springfield), shine na huɗu mafi haɗari "Ƙauye" - ba kawai a Jacksonville ba, amma a duk Amurka.
Bayan binciken ta hanyar sakonnin gida da kuma zauren taro, Na gano cewa wannan ƙaddaraccen imani ga mazauna Jacksonville shine yawancin Arewa da Westside na da laifi. Wannan, bisa ga bayanai, ba gaskiya bane. Dukkanin Jacksonville, ko dai Kuduside, Arlington, Mandarin ko kuma Intracoastal yankin, suna da wuraren yin laifi-wasu yankuna a duk yankunan birni suna da manyan laifuka.