This right here should be enough to get that part, at least, thrown out. If you have divulged your address, e-mail and all that information online then you bear the brunt of it being out there. It's only doxing when somebody goes and specifically gets a person's information through illegal or immoral means.
What suprises me is that he never uses the fact that doxing is illegal in Utah to make an argument. I mean, of course, it wouldn't have worked considering it only applies when you steal the personal info from his computer, but still, knowing him he would have put it in just to make it look better. It's strange that he had the brains not to do it.
Source:
Doxing amendment passed in 2017
Edit:
He might have a "doxing" case under Utah Code 76-9-201 (3) (because Utah is a retarded place, they have at least two different chapters under one of them it is legal, under another it is not), if he can prove the posting of his info (name is sufficient under that law) was with intent to "abuse, threaten, or disrupt the other individual's electronic communication". Interestingly, they did not bother defining these terms. It's also a coinflip on whatever it should be read as "abuse electronic communication, threaten electronic communication, disrupt electronic communication" or as "Abuse the person, threaten him, disrupt his communication". A simple ";" would have solved this issue in my opinion. Either way, clearly Null did not publish his info to "threaten him" given that he never made a threat, and given that the forum is against interaction, abuse fails for the same reasons, I think, as does disruption of Russel's communication.
Funny thing about his harassment whinning. It does not meet the legal definition under utah code. It will get instantly thrown out
le.utah.gov
Maybe he'd actually have a harassment case if he made it clear that he was talking about 76-9-201 Utah Code (as well if he could actually prove it was kiwifarms), but even then it heavily relies on the harassments being made by the same person over and over again.
Tl;dr: Utah code is garbage, but Russel should still have no doxing, harassment case.
He got a nasty phone call and whether or not the caller claimed to be "from Kiwi Farms" how are you going to prove it?
Why is that even relavant? He's suing the site, not the user. Given that the website does not promote (and even warns not to do so) making phonecalls to lolcows, the fact that some user of the website allegedly called him is irrelavant unless you are suing that alleged user. I genuinly don't think it'd matter even if he could prove it.