It doesn't matter. Even if they don't train on your inputs now they will "boil the frog" and do so in the future. What the user wants is irrelevant in the tech industry.

> If they are doing this and anyone can prove it, they are going to be sued very hard, and it will be a pretty straightforward case.

This is a joke, right? The usual settlement in these cases amounts to a few days worth of revenue.