Wow, I feel like I'm the only person here who is actually positively excited by this move by Blizzard to cut down on multiplayer cheating.
So, maybe I am wrong. I've been wrong before...
Still, my immediate reaction was positive excitement. It's not fun to play multiplayer games when there are lots of people cheating, or even when you're not sure whether the other person is cheating. Maphack is pretty much impossible to detect. Did that person hack their way to your expansion, or did they just walk all over you by superior intuition, by watching which way your units were going in the brief times they saw them? I know I have guessed where someone was sending their command center to, after reapering them out of their earlier base.
Also, personally I spent a *lot* of time getting a Kerrigan portrait, and I'd prefer that people seeing it know it was earned legitimately and not just hacked somehow.
I imagine I will get karma-trashed for this...