Are rabbits vicious animals

Yes and no. If you treat them badly, if you have a female and she's in heat, or you don't play with them, Yes. But most of the time, rabbits are very friendly!

Rabbits are normally very friendly, timid animals that wouldn't hurt a fly BUT they will defend their territory to the death. (Wild instinct) Every rabbit should have it's own cage (territory) and rabbits will often object to intruders into their territory (survival of the fittest) Rabbits will bite if threatened and they will scratch if scared. Rabbits are afraid of heights and if dropped will never trust you again and might bite or scratch if you try to pick them up. They will also bite if you squeeze them too tight. Fingers poked thru cages may result in a nip as your hands are salty and smell like food.