Currently, creating a personal space triggers the automatic creation of a series of sample pages. There appears to be no way for the administrators to modify the Personal Space blueprint to exclude these pages.
Provide a capability for admins to automatically disable this part of the personal space blueprint or determine their sample pages.
No current workaround. Delete the sample pages manually.
Personal space creation can be disabled in Global Permissions in Confluence administration. Go to Settings > Global Permissions, click on Edit and uncheck the box Create Personal Spaces for the default Confluence access group (otherwise, the group you don't want to have access to create personal spaces).