There is a bit of a heuristics-based arms race here for sure. https://blog.torproject.org/malicious-relays-health-tor-network/ https://blog.torproject.org/malic

There is a bit of a heuristics-based arms race here for sure. https://blog.torproject.org/malicious-relays-health-tor-network/ https://blog.torproject.org/malicious-relays-health-tor-netw... talks about this