What does that even mean? :)

If the module is on baCkPAN only, make a big note on the RT tracker that the module is abandoned ... and leave the status of all reports what it is

Closing the individual reports is weak :)

You never know, someone might resurrect abandon-ware (theoretically)

And rt.cpan.org "forces" its service upon all PAUSE authors ... why stop when they delete the module? :)