Yet you can't go around living in fear, it's not like it'll just go away because you've suddenly realized it's irrational, it's too deeply rooted for that, at least for most people it is.
Thus one ought to select social groups carefully, aiming not only for yield in the form of social parachutes to prevent unwanted freefalls, but also for specific content to spur intellectual growth; furthermore, internet forums make for effective "Third place"ish output channels (
http://en.wikipedia.org/wiki/Third_place), especially for oddballs.