[phpisthebest]

So what Percentage of BitTorrent Traffic would need to be "illegal" for it to fall under the classification of "obvious violation of US law" or "primarily used for illegal purposes" thus justifying targeting the technology instead of the individuals using the technology?

I have a feeling in this instance your bias is in favor of allowing bittorrent to exist because you have a personal use for that technology that is not illegal, and you do not have a personal use for the Tornado Cash technology, thus you have no ability to see legal uses for that tech.

I have found it to be an exceedingly rare trait for people to be able to externalize, and understand other people's worldviews. If they personally do not need, desire, or have a use for X, then they have no problems with the government clamping down, regulating or banning it. Never coming to the wider understanding that the government may (and likely will) turn it gaze to them.