As I understand this this is an attempt to see if there's any other mechanism which might help in reducing the number of runway incursions.
As a facetious suggestion a petrol filling station has installed a system to prevent drivers leaving without paying. There are a series of slots across the entrance/exit wherein hide a number of blades. If you don't pay then these are raised and you can guess the consequences if you try to leave.
Out of curiousity how does ATC find out that an aircraft has passed beyond where it is supposed to go?