Add a way for user to judge: "This is not a person"

Describe the feature you'd like to request

I have a lot of faces in the unclustered (NULL) area. Sometimes, some of them get readded to existing clusters, or new shit-clusters are created with them. Often, these are just random faces of passersby in the background or even none-faces.

Here are some examples.

It's totally acceptable for me that the face recognition is not perfect, but I would like to be able to fix the errors manually. And once fixed they should stay fixed.

Describe the solution you'd like

I would like to remove misdetections completely, so I don't have to worry about them being re-clustered.

Describe alternatives you've considered

Adding all NULL faces to an "Unknown" (shit-)cluster. However, this could cause a problem that newly detected faces might get added to this cluster, too.

The issue names no source files, tests, or entry points. Start by locating the flows for unclustered faces, face clustering, and reprocessing, then determine where a user decision can be stored; done means marked misdetections are removed and are not clustered again while newly detected faces remain unaffected.