Oh god, this is epicly funny.
Qft.
The original community had people ranging from mainly 10-17 years of age, which in time became 13-20 years of age. Then it seemed like only people from that age limit joined the game for quite some time. So then these 8 to 9 year olds come about when Retail hits, and we're not accustom to the stupidity, which I do admit, is outragious, but we should tolerate it as much as they should tolerate our "foul language."
Now, when we're basing how the age group should be just by how the concept of the game is, that's alot different. Building blocks is rather childish, I do admit. But it's obviously fun for people who are in their teen years, aswell. But aside from just block building, there some things that are primarely for the older crowd, due to its complexity for example: the event system.
I really do wish that these annoying pests wouldn't play, but it's their right to play it just as much as it's our right.