編集中のファイルを（ほぼ）二度と読めなくするコマンド

destroy.vim

" Joke!
if has('cryptv')
  function! s:destroy_file(has_bang) abort
    if !filereadable(expand('%:p'))
      echoerr 'Current buffer is not write out to file'
      return
    endif
    if !a:has_bang
      echoerr "Must to add '!' to destroy this file"
      return
    endif
    let cursor = getpos('.')
    normal! ggg?G
    call setpos('.', cursor)
    let &l:key = sha256(reltimestr(reltime()))
    write
    bwipeout
  endfunction
  command! -bar -bang DestroyFile  call s:destroy_file(<bang>0)
endif