Removing Email Address from Run History Details Page

As part of the GDPR regulations that are coming into effect, we are required to remove any email addresses that might be exposed in Cognos Connection.
When a report is scheduled / run in the background and set to be emailed to a specific email address, the Run History Details page displays this email address and can be seen by other users. We need to remove this from the Run History Details page.

We tried a few different options to get to this issue:
1. Manage Permissions: We used a tool that would update the permissions of all the reports in a specified folder to remove Read permissions, causing the option to 'View Run History' to not display in the 'Available actions:' menu. The downside of this is that this takes away the user's ability to edit reports and copy reports from those folders to a different location (Shared folder or My Folders)
2. We modified the templates\ps\portal\system.xml file and added exclude="run_history" to the class="report" tag. This prevents the user from seeing the 'View run history' option like the previous solution, but users are able to edit and copy reports. The downside of this is: We don't know how this would impact the settings of Cognos and need to make sure it isn't affecting anything behind the scenes. Also, this applies to all the reports across all the folders so we won't be able to troubleshoot any execution problems in any Shared / My Folders.
3. We are trying to find a more granular solution where we can only remove the option to the 'View run history details' page, which is at a lower level than the 'Available Actions' page. Is there anywhere we can do this?

Questions:
1. How does changing the system.xml to remove Run History affect the underlying settings of Cognos
2. Where can we go to hide the button to go to the 'View Run History Details' page