I agree. I thought everybody understood credit cards when I got my first one as a teenager. But then again, all my life my dad emphasized that you only use a credit card when you know you can pay it off the next month when you get the statement. But my dad's approach is fueled by a deep, deep hatred for paying interest, which he has passed on to me, lol.
Also, I just saw the Discover Card ad that proclaims a benefit where they'll pay your 6th month's interest if you simply make your payments on time, up to twice a year. I was horrified, as this implies that it's normal to carry a balance and have habitually recurring interest payments. I guess Americans are so credit-ignorant that this doesn't ring an alarm in the minds of the average consumer.
I should call my dad and thank him for the basic credit lessons of my youth