I was reading a couple articles on identity and information leaks from DNS. I was just curious to know how many TOR exit node operators run their own DNS servers as opposed to going through another provider (ex. google, opendns, etc). I'm interested to hear some feedback or thoughts.
I simply use the one the ISP that connects my relay is providing. It's surely not bad to have diversity in resolvers.
There are discussions about advertising a specific DNS resolver on the tor-relays list like https://lists.torproject.org/pipermail/tor-relays/2017-September/012940.html or https://lists.torproject.org/pipermail/tor-relays/2017-September/thread.html#12954
In the end you want diversity. Just like diversity in users helps, so does in relays. Of course exit relays should either have an uncensored connection or explicitely reject the censored IPs in their exit policy.