I disagree with your understanding of COPPA, but I'm not going to repeatedly argue over the precise boundries of COPPA because that's not the point. COPPA is not a First Amendment violation as I understood it, nor is California's AB 1043. The latter is still very bad, just not to the point of being unconstitutional (but it's close). AB 1043 would violate the First Amendment just like the Illinois one if it didn't add a last-minute open-source OS exemption.
> Not you. The OS distributor breaks the law if they don't give you this ability.
Ok, but that's a technicality and it doesn't change the fact that your entire ability to see/hear/say anything online is being gatekept by a legally-compelled utterance.