> _Not because I remember anything about it, or believe anything it espouses, or even like it all that much, but because it's a useful filter for obnoxious people in meatspace._

This made me chuckle wryly... :)

In a previous life, I might have been on who got along very well -- at least intellectually -- with those who loved Atlas Shrugged and swore by it as the bible of their lives. Now, with some age and wisdom, it's the exact opposite.

I myself wouldn't use a book as a filter for all things in social life... (for it generates way too many false positives), but I sheepishly admit to doing the same every now and then...

Different strokes, different folks. ¯\_(ツ)_/¯