/back is useless... as a doner you have /feed & /eat so if you die of hunger thats your own fault
OD on drugs... something you decide yourself, dont do drugs with stuff you need in your inventory. you have to press ''Shift+Right-click'' to do drugs.. IMO thats hard to do by accident?
Donaters also have more homes then regular player therefor just set a home if you are scared that your death is near?
As i see it as a owner of a donation rank, you already have this command if you set your new commands to the best of use!