I'm positive that no machine in my home network has ever been part of a botnet; the only explanation that stands up to scrutiny is the Tor relay that was runnin

I'm positive that no machine in my home network has ever been part of a botnet; the only explanation that stands up to scrutiny is the Tor relay that was running for a few days as a NAT forwarded service through my router's static IP address. I wish the faceless entity behind this widespread blacklist service could be identified so I could ask them.