Avoid error of granting access to granting node

I think this module should not allow someone to grant access to the node that is granting access. In many cases, the titles of the product and node you are granting access to will be similar or the same. An un-savvy user could grant access to the product instead of the target node, easily. How about not showing the granting product node in the drop down list of assignable nodes? And maybe show the node id next to the title of the node to avoid assignment errors with sites with similar titles?

Ok, thanks for your consideration.