I've been thinking that maybe it would be an improvement to require that dox be posted along with sources for all of the data, and ban dox that doesn't come from a "public source" (government site, news story, Facebook, etc.). This would make casual doxxing more difficult, help readers determine whether the dox is actually accurate, and hamper distribution of info obtained from illegal sources (hacking, etc.). I'm not sure that it would help enough to be worth the trouble, though.
The problem is that it means that people can't post things like shipping info and unpublished email addresses attached to PayPal accounts used in a scam. Ultimately, it comes down to whether or not it's more important to protect innocents vs denying scammers from reusing an identity.