Maybe requiring identification to speak online is not the intent but it would likely be the practical effect of the laws that were originally intended just to help children. It's not enough to think about laws' intent, but also their practical effects.

We haven't even mentioned the censoriousness that already takes place in various online forums not because a user said something racist or was stirring up trouble, but because moderators were vindictive, petty, or lazy, or because the automated moderation tools in place were heavy-handed and unintelligent. I don't look forward to that kind of moderation spreading everywhere and made more efficient by reducing everyone to a single identity. (Maybe Joe Contrarian has some opinions worth listening to, but it's just easier for the moderator of a forum to see that he was already publicly blacklisted by another unrelated forum, and just blacklist him on this one, too.)