At some point, if the Internet is going to continue to function, one of the likely outcomes is that these customers wake up some morning and the only thing they can get is a web page telling them they have a choice of disabling their fridge's Internet of Shit device or connection, or doing without their full connection to the greater Internet.

Compare to, for example, our stopping our use of lead in paint and gasoline/petrol.

That's a good analogy. In many places, owners of lead-contaminated buildings must remediate. One issue, of course, is poisoning of resident children. But another is contamination of the surrounding environment. Paint manufacturers are also liable, but that's a separate issue.

Basically, this is just environmental pollution.

Well, https://en.wikipedia.org/wiki/Copyright_Alert_System is happening.