API経由で匿名投稿？

[blake (Blake Erickson)]

その情報が UI のどこにも表示されているとは思いません。ただし、データエクスプローラークエリを使用できるようです：

Finding originating account of anonymous posts

There’s a good reason why that feature is disabled by default. You should have a really good reason to enable it and you should trust them to not abuse that feature. Maybe use a higher anonymous_posting_min_trust_level? You can use the following query in the Data Explorer if you really need to find out who’s who. But, if you need to use it on a regular basis you should really ask yourself if your community members are ready for the anonymous posting feature. Choose the right query depending on…