> In the Amazon.com Video section, they put a little note next to all the R rated films that says you must be eighteen years old to purchase that video. But the only way you could buy something from Amazon.com is to have a credit card, and you can't legally own a credit card until you're....eighteen!
>
> M"the moral of the story: don't post pointless signs."el

Or maybe the sign is there to deter sub-18 year old kids with permission from their parents to use their credit cards to buy ish from amazon.