Using Google Code might be a convenient way for you, as the module programmer, but it doesn't allow anonymous/no sign-up submission of bug reports. And as I don't want to be tracked by Google and hence have no Google Accounts (or cookies), this precludes me from reporting bugs to Google-hosted modules, like WWW::Mechanize and EU:MM. This is a bit unfortunate, but might explain why other people will submit bug reports here and on http://rt.cpan.org instead, where they can also be found by others in case the author is unresponsive.