Indeed it is pretty standard to tell the difference between an official package and a non official one by using a tags. Many people (myself included) use their initials, others use something that makes sense to them, e.g. AlienBob uses 'alien' and SlackBuilds.org uses '_SBo'. This makes it easy to blacklist groups of packages from the same author (or project). It seems pretty odd to introduce a new method when the current one has (and continues to) work pretty well after all these years.
EDIT: Tags also make it easier to list collections of packages by the same author/project.
Last edited by ruario; 09-20-2013 at 10:05 AM.