You may remember selecting your age as above thirteen years old when first created your account, were you actually above the age limit? I personally was under thirteen when I first sampled the game.
If you are under 13 and created an account prior to 24 November 2010, you will be unable to disclose personal data through the game or website. If we find out that any personal data we have collected is from someone under 13, we will automatically delete it. We recommend that, for existing accounts, parents / guardians should play together with their children.
As some you may have noticed, Runescape is being geared to appeal to younger crowds. While Jagex acknowledge that some of the game's content is not suitable for pre-teens, are they really making an attempt to stop under-age players? or do actually want these players to be a part of their community so claim the $5 a month the player might give them.
Continuing from the quote above, they then go on to say while we appreciate that many pre-teens would want to use our websites, we urge parents/guardians to instruct their children not to lie about their age so as to be able to use our websites before they are old enough. Instead, we recommend that parents set up an account and play together with their pre-teens who are otherwise too young to play the game… being realistic, there are very slim chances of this ever happening.