Are Race Riots News?

I have heard from non traditional news sources that whether Obama wins or loses, there will be demonstrations and riots.  Where is the major news media; the national and cable TV, the mass media?  To me, this is important news, a major story line.  Why are they so quiet?  Is it not to upset the “apple cart” and to give bad press to the Obama campaign?  I believe so.  Again the mass media shows the color of its stripes.