What did she say, & why is it so wrong?
From the article:
In order "to prevent such incidents from ever happening again," Reker proposed that women adhere to a "code of conduct," the Independent reported on Tuesday.
This code would require women to remain "an arm's length distance from strangers" within their own group, and encourages women to ask bystanders or witnesses to help should they feel threatened, according to the same report. In the future, women would do well to be aware of the potential dangers of events conducive to drunkenness, the mayor reportedly added.
Do I even need to explain what is wrong with that?
How is it your place to tell one woman what she is allowed to say to other women?
I didn't mention anything about being "allowed"; she can say what she wants, but I also have every right to criticize her for it.
This is also like asking what's wrong with telling Ann Coulter that she shouldn't say that women shouldn't have the right to vote. There are women who say sexist things about other women. Their gender doesn't exempt them from criticism for doing so.