Firstly, this is a bad idea, being as it is not merely magical-thinking woo-woo that will have problems at scale, but also is the sort of surveillance which (for example, and if it worked slightly at all) it Facebook were to deploy it, people would explode with rage at them for doing so. Why, then, should the rest of the internet be perpetually judging your typing style to determine whether you’re old enough to look at porn?

On age assurance, we are looking at the sort of emerging technology whereby, for example, one can look at how children type and use artificial intelligence to see that it is a child rather than an adult.

https://www.theyworkforyou.com/debates/?id=2020-12-15a.146.0#g155.0