<< vermin: Various small animals or insects, such as rats or cockroaches, that are destructive, annoying, or injurious to health. >>
I don't mind captive bred and raised rats, I think they can be just as good of a pet as any other rodent-pet (hamsters, guinea pigs, bunny rabbits, etc.). My neighbor had a pet rat that was very cool, it would curl-up in his shirt pocket and go to sleep (only part you could see was his tail hanging out) and hang around on his shoulder for hours. Very friendly critter.