First and foremost, there is safety.
Even years after the shocking episode, the debate over the ethics of the choice to shoot the gorilla continues to rage. Many people believe that forcing a wild animal into captivity for any reason other than conservation is simply immoral.
These stories should serve as a caution to all zoo visitors: these animals are not there for your enjoyment; they are naturally wild and deadly. Respect all safety procedures and avoid putting yourself – or others – in danger.