If your point is to stifle dissent, then sure. Whoever controls the narrative will make contradiction look unacceptable. If your name is tied to an opinion that may be construed as contrary to the dominant narrative, you will hesitate to post it, and if you do post it, then you will be taken down with very real consequences because of that tie to your real identity. Employers already look at social media to determine if your behavior is considered acceptable to them, even if you keep your professional life completely separate. Your proposal only destroys free speech further by making it worth less and less the cost of expressing.

Make no mistake, the excuse of protecting children from pornography is just that, an excuse, to restrict freedom of speech by putting into place the mechanisms to identify people and strike at them for daring to express their opinions. Pornography being in the form of books, magazines, tapes, DVDs, whatever physical media did not necessarily control access. There are many with stories of how they managed to gain access as children, either through a parent’s collection or otherwise. Similarly, this internet ID bullshit can be defeated, but it’ll be backed by stricter and stricter legislation to make defeating it illegal and they won’t be prosecuting children or the companies providing the ID verification service, they’ll be prosecuting adults using tools to defeat these mechanisms to express their opinions.