IBLs attaching themselves to drawings

Just recently, we have noticed that Item Baseline Lists have begun to attach themselves to the drawings in which their parent components are attached.  When looking at the physical item relationships for a drawing, you will see the component itself, and, in the document relationships, you will see its IBL.  This would not be a problem if the IBLs had the same security setting as all of the other items.  However, since these are baseline docs, they have some of the strictest zxecurity in the system.  This become a problem when a non-administrator tries to revise a drawing, and that includes our entire drafting department. They do not have the permission to revise when there are IBLs attached.  Does anyone know why this is happening?  Or how to stop it?  This is a recent development, that is why it is so confusing.