I've met people who are 11 and are so chill and classy, I could imagine them sitting calmly in a jazz club in a classy suit sipping coffee. However, I know grown adults over the age of 50 that would discriminate at the drop of a hat, and any hat, that is.
The real issue here is maturity.
Since maturity cannot be measured on a tangible scale, if it related most closely with age, since most often it has a "common correlation" to it. It is different from males to females, but since Blockland is predominantly male, the common correlation can often be assumed- something that I observed for a while after spending hundreds of hours in-game.