注册验证挑战以阻止垃圾注册

也许 Discourse AI 的垃圾信息检测功能能提供帮助?它无法阻止注册,但可以隐藏垃圾帖子。(另见:Immediate actions you can take during a spam attackhttps://meta.discourse.org/t/tips-for-preventing-spam/264020)