So, when you become the equivalent of a weathered, crotchety old man in the Open Source community, in IRC, at meetups, or anywhere else... kindly fuck off.

Sorry to be so blunt, but that's the point, here. It's fine not to want to help annoying beginner #5,000,000, but it doesn't require being an ass to the community, at large. Just keep your mouth shut, unless you have something nice or helpful to say, please.