It would be useful for administrators to be able to find all instances of a particular module type in the site. In the Modules screen there is a count of the number of instances of each module type. I would suggest that the number is clickable and that shows a list of all those activities/resources.
This is purely a convenience feature for administrators where you want to hunt down instances of actvities or resources.
(I'd be happy to implements this if though a reasonable idea)