I travel a lot for work internationally and, comparatively, the US is out of control with portions across the board. You just can't get it. And people would look at you crazy of you asked. It's always been so much easier for me to eat normal portions when I travel outside the states. I could see how, if it was adopted broadly, it could impact people positively.
So, for me, I say cut the portions. Nobody needs it and everyone else around the world survives just fine without it. I've heard people say that "being able to get a 60 oz soda is what this country is about". I must've missed that memo. For me, and just for me, "freedom" isn't about a super sized meal.