General:
https://pethelpful.com/exotic-pets/dangerous-exotic-animals-pets
https://www.wowamazing.com/animals/domesticated/dangerous-animals-as-pets/2/

Kinkajous:
https://www.wormsandgermsblog.com/2011/03/articles/animals/other-animals/kinkajou-owners-beware/
https://pethelpful.com/exotic-pets/The-Kinkajou-or-Honey-Bear-A-Rainforest-Mammal-and-Exotic-Pet

Piranhas:
https://www.thespruce.com/are-piranhas-dangerous-1380967

Snakes:
https://www.thesun.co.uk/news/4538647/most-dangerous-snakes-pets-venomous/
http://feafum.blogspot.com/2014/02/6-most-poisonous-scorpion-in-world.html

Crocodile Monitors:
https://regalpet.com/pets/750-crocodile-monitor-lizard

Scorpions:
https://www.thespruce.com/scorpion-species-1237307
https://www.express.co.uk/news/uk/749396/Train-carriage-evacuated-pet-scorpion-escapes-ice-cream-tub

Big Cats:
http://edition.cnn.com/2003/US/Northeast/10/04/nyc.tiger/