Content locking in email fragments

In AJO we have this advanced content locker when we work with email templates. But we experience an weakness in how we can work with this. And that is when our email templates is created by fragments. You can lock and basically control most of the content in a pre defined template. But that is only when all needed fragments in already in the template. 

When users -witch is common usage, drag and drop new fragments they want and need into the template, from the fragments library/menu, there is no content locking on those. 

It the fragment you drag into the template has text or other content areas that should not be changed, or the formatting should be locked it would be nice if this could be defined on the fragments itself. No we cant set any limitations when it comes to content in a fragment, when is comes to locking fragment content form been edited after been dropped into an email template.