If 20 people were to stand up on a soapbox with a megaphone in times square screaming about /r/redpill, /r/fatpeoplehate, etc concepts they would be removed if legal, and if not legal a huge countermovement would appear to try to force them out. On Reddit you get both the megaphone and the safe space, but are still just as easily accessible to the public as anywhere.

Its "real" freedom of information, without many of the mechanisms that larger society uses to fight back against it. Instead it is just ignored and left to fester and grow until it pops into the public forum at the point where huge efforts are required to fight it. I feel like the internet is a great way to get differing views out, but not a great way to build any cultural agreement.