Level = maturity, more often than not. Sure, there are level 138s who are total [bleep]s, but often, higher levels are more mature. Reason being is that it takes YEARS to get 2k+ total. And usually, with age comes maturity.
Uhh no, I have a few maxed out friends that ive talked to in runescape for years. A few of them knew Gertjaars for example before he was number 1 and he was nice then. Second he got the rank he became an ass.
My point with this is levels =/= maturity.
Yes someone will be older at 138 then they were when they started but it doesnt necessarily mean their not a jackass. The 30-40 year olds on xbox live and WoW can attest to this.