“Reddit has stressed that this system is only to verify users' age, and it has no interest in your identity. Lee further stated that Persona won't know what subreddits you visit, and has promised it won't keep users' uploaded images more than seven days.”
Press X to doubt.
The “won’t somebody please think of the children” rhetorical tactic is always just a pretext for authoritarianism, mass surveillance and data privacy intrusion. Always. It’s the perfect motte-and-bailey: when you attack the actual motives, the motte becomes, “So you don’t care about children?”