“您的账户已被冻结”，但无人通知

[piffy]

I’ve also found some silenced users that were not in the review queue. In my case they were automatically silenced by this plugin

Stop Forum Spam Plugin (auto silence known spammers)

Overview The Stop Forum Spam plugin (unofficial) can help weed out human spammers who are able to bypass Discourse’s built-in spam tools (thanks to their awesome human powers). Right after a new user signs up on your forum (before they have time to post), this plugin will check the user’s email address, forum username, and/or IP address (depending on your plugin settings) against the Stop Forum Spam database. If the user is found in this database of known spammers, their user account will be imm…

Might be intentional but just wanted to share my experience