Fred what I am doing is explaining how things are designed in the program. As noted your free to post suggestions for future versions for consideration when we are in an open development cycle.
Customer feedback is important and crutial and yes this is one of those things I have never seen someone personally suggest and no overall its not a hard thing to do. That is remove the global permission and add category by category permissions. Same thing with feedback some changes have occured but usually changes made are customer suggestions and no one has made your specfic observations.
However I feel I should clarify a point here. Your discussions seem to suggest you expect us to provide an immediate solution. That is not how its done whether its vbulletin or here. We support the code as it is written. We suggest customers place suggestions for future additions and then when we get ready to code a new version we look at those suggestions and prioritize them and then start coding a new version.
I do beleive I have posted once all the vbulletin 4 stuff calms down and they go gold I will be opening a beta adding new features to classifieds which will be a couple months from now I think.