It's all public information that is being collected by anyone who wants to anyway. The point of exonerator is to collect this information in a way that could possibly be used in court as evidence to absolve an operator if incorrectly accused of a crime.
It's good work and I for one as an exit operator am glad it exists.
Can you explain me how this type of public information is good for any kind
of tor operators security, and tor network at all?