Prevent specific group from receiving shares?

Hi all,

we have a group that contains a large amount of users (400+ users), the group gives access to a group folder (we use the group folders app).

The problem is, sometimes users share stuff with that group, instead of storing it in the groupfolder like they should. Of cause this can be fixed manually, but it would be nice to prevent it in the first place.

So my question is, is there a way to prevent this specific group from receiving any shares, while still keeping the possibility to create shares for all users?

I know there is a setting to prevent certain group from creating shares, however this is not what Iā€™m trying to do.