When my kids open a pack they usually don't even look at what cards they get. They spread them out just enough to see the border - which is enough to tell whether you've gotten a rare card or not. I'm sure they've thrown plenty of cards in the junk bin without ever once looking at them.

The "special art rare" ones are admittedly pretty cool, and those do get taken out and looked at from time to time. Usually when friends come over.