The Database view has a useful "has no valid address" checkbox right on the constituent record. There are built-in and heavily used tools in query and export to exclude records who are marked as such. However, records with this checkbox marked do not display any indication of a having no valid address in the Webview.

This is a complete failing of what a CRM (customer relation management) software package should be able to do. There are data fields in place indicating how a customer relationship should be managed, and they are completely ignored and disregarded by the Webview. This is beyond frustrating as a user and Blackbaud and your developers should be embarrassed to have your products functioning in this way.