Give the option (when configuring) to define whether a custom field should be allowed to be reported on
Over time our system has become cluttered with custom fields (for ex. multiple fields called something similar) which makes it difficult for end-users to determine which fields are relevant, unless they have access to configuration mode to identify the ID of the field.
It could be useful to have the option to mark a field whether it should be reportable or not, minimizing the list of available fields that can be used.

Thank you for the suggestion—while the idea does have merit, it's not something we plan to pursue at this time. However, within the Report Builder, you can use the custom field search to filter the list of custom fields by caption, field name, or ID, which may help achieve a similar outcome.