Concepts
The Bulk Entrant Value Updater is a tool for mass updating records of various types:
On the left side under Settings, you specify the criteria for the records to be updated. On the right under New values you enter the aspects of those records to be changed. Certifications and assignments can be deleted here in bulk, people can only be updated.
If a user has access to this tool, he can completely bypass VSys security permissions for changing, deleting and updating objects - even those he has no rights to.
Changes made here cannot be un-done automatically. If you've accidentally changed everyone's first name to "George", you'll have to either manually re-enter all of the original names, or restore from a backup.