Did SE hire Anita Sarkeesian...?

Well, I agree with OP. This may actually backfire. Sure, most will bite their tongue and deal with it, but this sort of policing will bring forth the worst in some people.

It would be better if they handled it in a similar manner as they did with rmt. For example a context menu on the names of your teammates after each match (select player -> report harassment). Needles to say it would have to be somewhat restricted (avoid spam reporting).
If reported and found guilty then NO CHAT FOR U!
Of course, this would probably rise other issues, and SE will probably avoid spending resources on a system like this.