I'll grant him that, of course. Still, the tone smacked of many a time during my own childhood when an adult would blindly chastise my young opinion(s) solely based on age, not merit.
The model railroading community seemed to be full of this; funny how many of the latest talented superdetailers are in their teens and twenties. That's karma for you.
Heck, I started doing eBay at the age of 10. If it weren't for the relative anonymity of the internet, I bet I wouldn't have had a single sale due to this stereotype that young people are less trustworthy by default. Granted, some communities breed exactly that, but it's not necessarily fair to pigeonhole everyone as a norm.
Not trying to start anything; just commenting on how the comment struck a nerve here.
-Kurt