Which one do you think is better? A generic email address, definitely. Or else do nothing.
It would be wrong to, e.g., call me the owner of administration, or rms the owner of Emacs or Jeff Bailey the owner of tar, so don't do that in any event. At least with generic email addresses, we're not specifying wrong information. Furthermore, I think I would suggest uniformly using bug-pkgn...@gnu.org. Per GNU standards, that address is always supposed to exist and be monitored for bug reports. (Although I know some packages do not do so, but that's a different problem.) There is no other per-package address like that. Also, that way the info could be automatically created. We don't want to create yet more places that maintainers are supposed to insert redundant information. Above is for gnu packages. For nongnu, I can't think of anything to be done. (Aside from the well-known todo of creating a UI so package admins can update the info themselves.) karl