In my opinion, the most scaring venomous snakes to keep in captivity (in a zoo, and only in a zoo, with mentor OK), or not to say, I would not love to keep them never ever, are: 1. Black mamba 2. Boomslang 3. Inland taipan 4. Egyptian cobra 5. Maybe bushmaster snakes 6. Blue krait (or kraits in general) (because of pre-synaptic neurotoxins bungartoxins) 7. Russels's viper What are yours?