there is nothing that has to do with the age. all that matters is how responsible and mature the person is.
Admin and SA age?

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Its just plain abusive to delete one's comment just because they disagree with you, SAs and As. The thing is I was not even targeting him rather the 9/10 year old so called matured kids who kicked him out for no reason or just because he didn't do a great job as a mod.

Yeah everyone may get kicked if they don't do a great work. It's just normal and it doesn't matter
Wrong. People get demoted for that, not kicked. Age do matters.

But as you know, atleast 4 of the SAs and As are under 18. So I don't see why they would wanna disagree.

I'd say that it ain't right for a person not to be an administrator just because he or she is a minor ... however, it's common sense that the older you are, the higher the probability that you're gonna make a good admin. Of course, if you're ten but too mature for your own good, no one's stopping you.
What's the usual age for SA'S and admns?