If I was in his position, I would definitely feel the implicit threat of "if you're not willing to provide all the info we're requesting, you lose your domain".

> 2. registrant doesn't have a legitimate reason, 3. registered/used in bad faith

I've read arbitration cases where "The Expert" says (simplifying): "the site is being used for illegal activities, so there's no legitimate use", when no actual court or official institution has declared that the site's content is illegal*. So, you're at the whims of some "Expert's" opinion of what's legitimate, even if it may eventually contradict the actual justice system of your country.

I have very little trust on the competence and fairness of UDRP arbitration.

* And it's not a case where the things are evidently illegal, it's very debatable if they are.