> The only person in the world who can be suspected of having originated that traffic is the person from whose network the requests can be seen originating.
The IP address presumably actually belongs to the exit node operator's ISP. By this logic they should be raiding them instead.
> There's no way for law enforcement to know he didn't make those connections until they investigate
There's no way for law enforcement to know that you didn't make those connections until they investigate. That shouldn't be justification for raiding you, should it?
> If you're going to run a TOR exit node, which you are absolutely free to do, you have to expect this to happen from time to time and be prepared to explain why you are not responsible for the traffic you appear to have originated.
They already knew it was an exit node.
> If standing on principle was free, it would be unremarkable.
That is a very poor justification for unnecessarily making it more expensive.