Mature Minecraft SMP Server?

I'm 13, and I'm looking for a mature, strict no grief policy SMP server. (SORT OF LIKE THE CUBE SMP SERVER ON YOUTUBE)

If you own one, or know the owner of a good one, please let me play/refer me.

Info:

13
Female
Been playing for 2 years
Have never griefed/Don't have the desire or see the point in griefing.
Very mature for my age (or so people tell me ^.^)

Thanks in advance!

(If you need to contact me, my email is nmsfreshman.dixon@gmail.com
Don't try to spam me; it is an old email and I'm need to get a new one:})

Try to track down MatureTheBeast. I know it's a server for mature minded people and although they used to have an age requirement I believe they've recently gotten rid of that.

Try Bosscraft, it's a no-grief survival server, whitelist only, run by adults. http://bosscraft.enjin.com/home