Relational Web Reports, Changing Data
Data can't be changed by the user!
As each of the HTML Pages used to create the reports are pure HTML that are completely removed from the original database, there is no way that the contained data can be changed.
This may seem to be a disadvantage, but in many applications, the fact that you can't change anything, will give many users much more confidence, as they know that whatever they do, they can't corrupt the database.