The idea that there is such a thing as "law-breaking products" when consumers ACTIVELY CHOOSE TO SPEND THEIR MONEY ON THEM is insane to me. This is authoritarian nonsense.
It is not the state's place to tell people what they should or should not be allowed to buy.
You will always find people willing to spend money on anything. The whole point of politics is that we have to draw a line between what people want to do and the effect that it can have on other people. To put it simply, if your freedom affects mine, then someone needs to decide how far you can go and how much I have to accept.
We commonly accept that scams are bad, even though someone might participate willingly, just because it is much more likely that someone is taken advantage of in a way that most people find immoral, for example. Even in bastions of free speech such as the US. That someone somewhere knowingly gave money to someone else is neither here nor there.
The most extreme example could be the legislation on weapons. A less extreme example could be legislation on food additives or PFAS.