While i am all for learning sometimes the person just needs a simple answer now, rather then a whole serious of articles/posts.
While i completely understand why most have responded in the way they have he DOES have a point. If he directed his anger at say someone who cut him off in traffic you would of all shared immature stories of following them and vandalising their car. People only get on the highground when the criticism is aimed at them.
Use the opportunity and explain something. Teaching someone else might show you the gaps in your knowledge. Maybe then someone else will chip in and educate us all little further.