At Sephora, the makeup is just sitting out in their packaging that anyone can open, look at or sniff. So you have to look at the ones you pick up to buy carefully - scrutinize them.
I actually prefer that to having to ask at a counter (ie - department stores) or grabbing a sealed package of who knows what at a drugstore. Sephora has revitalized how one purchases makeup: it's become an experience and not just 'shopping.'