Probably depends on whether you’re living in the States or not. If I were to do such a thing as an European citizen -Norwegian to be exact, then nobody could stop me. The US government could be however pissed they want, but they have no juristiction here, nor do my country extradict its own citizens. Neither does it usually acknowledge any US lawsuits, as they are… Extremely exagerated much of the time, and borderline childish. You can’t sue people for serving you hot coffee here, or sue the owner of a house because you fell down the stair.

So in short, I can do whatever I want with my products that I have bought from an US manufacturer, and all they can do is watch me do it.

I used to play Elite Dangerous for 6-8 hours straight, with a standard unmodified Vive. Didn’t have any problems, but can’t speak for everyone of course