If some independent mapper wants to change crucial data such as adding or removing a way to a route relation, or change the name of the relation, the “owner” of that relation could have the right to approve or reject the proposed change. The “owner” is expected to react to such proposals, and if he doesn’t, the ownership rights could be revoked. The “owner” of a shop node could be required to update a checkdate tag once a month/quarter/year (and update any other tags that have changed since the last check), and if he doesn’t, the ownership will expire and the node will become editable for anyone.

such a system could be implemented on a copy of the data, something like “verified OpenStreetMap”, but completely unlikely to happen on OpenStreetMap.