Hi, Bogie and guys,
There are many bolt action safeties that lock the firing pin, including the Mauser, Springfield M1903, Model 1917, Winchester 70 and Ruger 77. The Remington 700 safety retracts and locks the firing pin OK when new, but can fail trigger reset when worn.
I agree, though, that no one should depend absolutely on any mechanical safety and should always keep the rifle pointed in a safe direction.
Jim