We have both alligators and crocodiles in FL. The alligators are not noted for their good humor but I understand the crocs are even less agreeable. They used to have a gator in the pond in front of NASA KSC HQ to entertain the tourists.
Then there are the ones who want to look in your fridge....
Must have been 20 years ago that I read where someone had built an alligator farm in the Rocky Mountains. Escapees typically froze to death fairly quickly.