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Could minors (a member under 18 years old) have their monikers in a different color, or somehow noted? I think there are many reasons it would be favorable to know when you are playing with, and talking to a minor. There are many things which are acceptable behavior among adults, that is unacceptable between an adult and a minor. What made me think of this... I am playing someone with a very cute smile in her picture, I was going to comment in a flirty kida way, but then I wasnt quite able to tell how old this person looked. I do not want to say something like "hey sexy, nice smile" to a minor. Also, I can anticipate a situation where a minor will pretend to be an adult in their conversations, and that would cause one to say something which might be inappropriate if said to a minor ie swear words.
I know there is no way to prove who is a minor, if they lie to you when they sign up as members....but the majority of minors have parents who watch over their internet use, and I would guess that those minors would be forced to admit their age category (minor or adult)