Requested feature overview description.
allow the use of - to exclude tags with wildcards like you can with regular tags.

Example

; returns all posts tagged male/male except those with atleast one tag on the form *penetrating.

Why would it be useful?
Tag projects. I've been trying to stay on top of the more specific penetration tags and this would be much easier if the searches -*penetrating* and -*_penetrated worked as suggested above.

What part(s) of the site page(s) are affected?

everything with tag searching. Probably the implementation of the wildcard and/or exclusion search features.