Kicked out of Barnes & Noble -- do they even still exist?
That would be the same as me moving all science books into the fiction section, because I think THAT is all made up. What I would say to this guy is: Part of life is recognizing that other people get to do stuff you yourself think is dumb, but you don't get to stop them. If you want to move stuff around, go to a local food bank and help unload trucks or pack relief boxes. That will satisfy your urge to move stuff AND produce a tangible social benefit.