This topic on the other hand has nothing to do with fair use as there is no derivative work being created. It also isn't a copyright violation, it's a violation of the DMCA. Specifically it violates the DMCA's provision that prohibits distributing tools used to violate the copyright of other work.
Absolutely not.
Just as an example, the Sony v. Universal case involved direct copying from the TV stream to a VHS tape. Not only that, but it saved Sony itself from the contributory infringment claim too, not just the hypothetical users from their hypothetical direct infringment.
As for the DMCA issues, they're probably unconstitutional. Because fair use is constitutionally required (as held by SCOTUS in Eldred and Golan), a law that results in the doctrine being basically impaled by proxy can not stand.
This is the same rationale the court used in the VHS case. Because a fair use was found, Sony was allowed to continue making their devices. If it was tried today, the DMCA's anti-trafficking provisions wouldn't be allowed to stand IMO, as they would conflict constitutionally with the fair use requirement and factual finding in its favor by the court.
And while you are allowed to implement technical measures to prevent people from doing this or make it difficult you shouldn't have any legal protection.
You are allowed to make an emulator because there is nothing that says it's illegal. Under the DMCA, you are not allowed to distribute tools which help in the circumvention of copyright, which is what this tool does. It allows people to bypass the copyright protections Nintendo has put in place to prevent people from running copied games without permission.
Tools that facilitate this legal use shouldn't be an able to be taken down. It doesn't matter if you think they're using those tobacco accessories for something else.
But a tool that allows you to break say HBO's streaming DRM wouldn't get this protection.