Unfortunately I've been there ... back in the day I posted a couple emails on mono-list about how Gnome is poisoned (with all the bells and whistles of an anti-MS propaganda, GNU/Linux and all that crap). I ignited flame-wars that probably ruined the day for some people.
In retrospect I really regret that.
Young people want to be a part of something. If that something promises to save the world from evil, it's even more alluring.
For me the day came when I got married :) Since I believe in "doing what you love" it can be unbearable at times while working hard for an income to support your family, to still work on cool shit, and to still have valid arguments for a religion that promotes and even requires "free as in speech" for products of essentially very hard work.