My friend and I were telling her boyfriend a few weeks ago about being harassed in places like the grocery store, the mall, on the street, in the bank, at a restaurant, etc. etc. etc. and he was horrified. This is because he is a good person who's never thought about doing that to another person. Then I asked, "Well, what do you do when your friend catcalls someone?" and he said he gets very embarrassed. But he didn't tell the guy to stop.
Women everywhere are sexually assaulted by men in power. Many don't bother to speak up because of reactions and consequences like this: Ghomeshi is a man in power and he is also well liked and well known. Chances are, he will be almost universally believed, while she will be accused of lying to get something from him. The majority of women speak up because they want justice. And right now, we don't know what the real story is -- but as someone who never spoke up when a man in power put me through hell, for a variety of reasons, I believe her until further notice.