In some project trust between main and subcontractors is very low. In those it makes sense to add a pre-approval step before issues are available to all users. The workflow would work like this:
Anyone would raise Notes
All Notes would go to a specific Mgmt team first
This team would decide if the issue is a real problem and either "reject" or "release" the issue into the project
Responsible Team would resolve the problem
Post-approval done by Reviewing Team
All this would ensure that only issues relevant to the Mgmt lead to notifications and are worked on.