Absolutely... I've submitted a few Complaints to CBC via its "contact us" link @ http://cbc.radio-canada.ca/about/contact.shtml
(where the form actually exists). I have also sent 2 or 3 emails to Angus McKinnon (Senior Advisor, Media Relations and Issues Management at CBC/Radio-Canada) and my MP, Ed Holder.
Of course, I never received any response or feedback... so I'm not sure how effective these Complaints are.