Sorry, I might be missing something but can you point out where the author is saying they're against this or that its a "concern"? They say it can be disruptiv

Sorry, I might be missing something but can you point out where the author is saying they're against this or that its a "concern"? They say it can be disruptive - and explicitly say to whom it is disruptive ("people who don't run into the kinds of people normally" i.e the masses) but I'm not seeing this explicit point where the author says it's a bad thing - only that it's a challenge to moderate everyone tactfully. Can you help me out?