In reply to Mical:
> Why does age have to be a legal stipulation.
It has to be thus so that people can be suitably judgemental or patronising. I mean if I saw a picture of a kid on an 8a I need to know their age so I can castigate the undoubtedly pushy parents. Similarly, if I see one of yet another coffin-dodger charging up an E6 I can tell them to get real and go to bed with a mug of hot cocoa (milky of course).