Yeah, if you file a bug with Yuzu, or join their chat channels and request support, and there's any hint that you didn't use your own switch you'll be banned instantly. They really do have a 0 tolerance policy.
Companies are likely not that bothered by legacy systems being emulated, but this is the current Nintendo flagship console. Thankfully the Switch seems to be selling amazingly, which should mean Nintendo don't really care that much.
Another factor is that you will likely need a pretty beefy PC to play games in full speed, and compatible controllers.