No Arrow Keys in Vim

From https://github.com/thoughtbot/dotfiles/blob/master/vimrc
" Get off my lawn
nnoremap  :echoe "Use h"
nnoremap  :echoe "Use l"
nnoremap  :echoe "Use k"
nnoremap  :echoe "Use j"

Interesting. Maybe I should put these lines into the dot file to prevent the intern from using the arrow keys?

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