in reply to
Howto abandon rights to a cpan module and stop getting bug reports for it?
The good way would be to find one of these bug-reporting users (as they, obviously, care about the module more than you do), and make them into the maintainer.
The bad way would be to simply delete the distribution from CPAN.
Update: It seems that RubyKat already has given maintainership to someone else and removed the file from CPAN. Then I'd release an updated version of the module that does not contain my email address, to obscure my authorship.