Remove or hide users in User Login Status Summary under ‘Login Status’

I have spoken to several clients who have suggested that Users who are disabled in System Administration should not show in the User Login Status Summary under ‘Login Status’. For some companies that have quite a large turnover of staff the list just keeps on growing to the annoyance of some Managers where it shows ‘disabled’ users as ‘Logged Off’. If they can’t be removed, then perhaps they can be hidden from view.