Disclaimer: this bug has been filed in a semi-automated manner.
When emerging the package app-crypt/gnupg-2.0.19, the following elog messages are displayed:
* If you wish to view images emerge:
* media-gfx/xloadimage, media-gfx/xli or any other viewer
* Remember to use photo-viewer option in configuration file to activate
* the right viewer.
Such messages should only be displayed when the package is a new install.
These situations can be checked in the ebuild as follows:
if ! has_version 'app-crypt/gnupg'; then
See the tracker bug 440214 for more details.
I don't think that reducing these warning will have any positive impact.