Shell session to demonstrate (DO NOT DO IT IN THE DIRECTORY WITH IMPORTANT FILES):

  $ touch important
  $ chmod 400 important
  $ rm *
  override r--------  vbezhenar/staff for important? n
  $ touch -- -rf
  $ ls -l
  total 0
  -rw-r--r--  1 vbezhenar  staff  0 Mar 24 14:35 -rf
  -r--------  1 vbezhenar  staff  0 Mar 24 14:35 important
  $ rm *
  $ ls -l
  total 0
  -rw-r--r--  1 vbezhenar  staff  0 Mar 24 14:35 -rf
  $ rm -- -rf