Here's the 8chan policy re doxxing:
DOXING PUBLIC OFFICIALS
Posting the restricted personal information of public officials are grounds for a permanent ban from all boards. The post must be deleted as well. If the post happens through Tor, delete the post, but do not ban Tor globally as other innocent users might need to use it.
Ban reason: "18 U.S. Code § 119 - Restricted personal information of public officials"
Ban length: PERMANENT
https://www.law.cornell.edu/uscode/text/18/119
If not a public official but combined with a threat of violence, would also be a delete and ban for this board. The main thing is not to put anyone, friend or not, in the line of fire.