Thank you for your bug report! It has finally been addressed :P

You can silence warnings with "--warnings=none", and the documentation
has been updated for this. The "--silent" option is only for
informational messages.

-- 
Ileana Dumitrescu

GPG Public Key: FA26 CA78 4BE1 8892 7F22 B99F 6570 EA01 146F 7354