So the TL;DR is that there were some sysops from Mainland China who abused their privileges (CheckUser allows one to find any user's IP) and were banned, and as

So the TL;DR is that there were some sysops from Mainland China who abused their privileges (CheckUser allows one to find any user's IP) and were banned, and as a result the process of signing NDA's for those who could have access to private information has been changed? And that change was unannounced to reduce risk of infiltration?