Same is true in VT, or at least it was back when I was working a convenience store ten years ago. It was the responsibiliy of the store to catch the fake ID; kid passes a fake ID and the employees make the sale, the store owners are in deep s**t.
Man, I used to *love* carding the kids who would come in and try and buy beer. I'm usually a nice guy, but sometimes there's nothing more enjoyable than being an absolute a-hole to someone. Even better was when the kids tried to bribe you with like five bucks to let them walk out the door with a twelve pack. Good times.