[sciurus]

I'd recommend the opposite. If you're apprehensive about hjkl, force yourself to use it anyway!

  " disable arrow keys
  nnoremap <Up> <nop>
  nnoremap <Down> <nop>
  nnoremap <Left> <nop>
  nnoremap <Right> <nop>

[ehsanu1]

I didn't advocate using arrow keys, but rather using ijkl. Your suggestion is not mutually exclusive with my own, you can do both. :)

Though I guess the mappings I provided would have to be noremap instead of map.