I'm not comfortable with the idea that children's private messages would be exposed to thousands of social media workers and government employees.

Let's say I'm sitting outside of your office with a bazooka and boxes of high explosives. You ask my why, and I say, "someone might try to rob this office." You say, "somehow, that does not persuade me that a stranger should loiter outside of my workplace with a massive stockpile of ordinance." I reply, "what's your solution to combat robberies?"