If the rules are taken literally, yes - it is against the rules to ask personal information.
You must be at least 15 years age to be able to talk on runescape.
Quel-age tu?
A players age is not displayed anywhere on RuneScape, nor the website.
No, you cannot change your RuneScape age. Once you have put it into the system for the first time, it stays that way.
It is not possible to.
The minimum age to play Runescape is 13. or 12 (idoit)
Your age is required to play create a Runescape account. In addition, you must be at least 13 years of age, or your account creation will be denied.
13
You don't. Once you specify a certain age, you are stuck with it.
13-20
One can make a Runescape account by logging into the official website of Runescape. One has to provide age, email address and password in order to make a Runescape account.
No, you won't be banned.