It is completely forbidden to post confidential personal information or to make threats on this group, or indeed anywhere - it's unacceptable behavior by any measure and has always been considered extremely poor netiquette.
If there is a dispute, deal with it offline, not here - the threads containing personal information and the to-and-fro bickering have been deleted.
If this happens again we will, regrettably, be forced to ban those who breach the rules.