We have a large team using confluence. Everyone contributes. But when data decays it is possible that people will use outdated information. Seems like an effective alter would be to have data files that havent been updated for a while (say 6 months) or havent been viewed in that period (or some other) to be flagged.
It would be great if pages that met come obsolescence criteria could be displayed with a watermark (or a banner) warning that data might be suspect.