My Walmart Blu-Awareness Experience

[Diesel]

So I'm in customer service at my local walmart returning my recently picked up copy of Batman Begins (case didn't seal, latch missing, got a new one all's good now), when a woman walks up with two blu-rays. One was Traitor and I didn't get a good look at the other. She says, and I quote:

"I need to return these. I didn't know that I need a blu-ray CD player to play these. I just have a regular movie CD player."

COME ON!!
The cases are clearly blue
The cases clearly say BLU-RAY DISC on the top
and if I'm not mistaken, don't the backs say "only compatible with blu-ray high definition players" or something to that effect?

Is blu-ray awareness really that low?
I would like to think its not, and that this is just an isolated Ignorance Case.