Option in CPM block specific packages from being used (restored)

[jbennink]

Is there a way to reference a package in CPM in such a way that this package cannot be restored. Something like a "disabled" attribute.

I want to prevent developers from adding specific packages, like the ones that have gone commercial, from being used at all. The current package version filter version-range [8.5.0..9.0.0) does nog work -- at the moment -- and still allows developers to nuget update to those higher version. I want to block a package from being restored in any of the projects under CPM.