alert when xref is moved

Hi-

I'm new to the programming thing, and this one has me stumped.  We have a problem with people accidently dragging xrefs.  The simple solution would be to put all of the xrefs on a locked layer, but I was vetoed on this suggestion.  I've been trying to figure out if I can write a lisp that will do one of the following:

1.  Give an alert if an xref is moved.
2. Not allow an xref to be moved.
3. Tell the user when they open a drawing that an xref is not at 0,0,0 insertion point.

Any help or suggestions would be much appreciated!

Thanks so much!

Meredith

Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.

Image may be NSFW.
Clik here to view.