What if you had to show Government ID whenever you entered a grocery store, a library, a movie theater? What if you were tracked each time you consumed a video, a still image, an audio clip, or even a text message? What if the government kept a record of any or all of those checks? What if they arranged for third parties to commercialize that data so they could 'legally' end-run any restriction on domestic spying wit…
If you extend this policy to "consuming a video/image/text message," that would be dystopian. But this is about porn. Maybe it'll be a slippery slope but I doubt it. I wouldn't vote for this policy but I get it. Lots of people don't want kids watching porn. And it's not just social conservativism, people across the political spectrum think porn is addictive, psychologically damaging, and leads to sexual dysfunction.
whether or not you agree with the blocking of that sort of content, supporting these sort of restrictions on pornography means supporting a policy that lets the government gate content they deem objectionable behind an id check. i guarantee you there's at least some content out there that you're not going to agree with the government's definition of pornography. or even if you agree with the current government on all their content moderation choices, you might not agree with the next one.