For our use need to be able to notify watcher when they are removed from watching and issue. And sending the notification can not be disabled (except by system admin)
The whole idea about a watcher is someone that wants to be kept up to date on an issue. If they remove themselves they've decided they don't want to watch it. If someone else is removing them then change the permission on who can manage watchers. you'd have to go into the code and somehow capture when someone becomes a watcher and keep a list of them in a hidden location of any watchers that stop watching and modify the notification scheme to include that list. Only a system admin should be able to modify notification schemes. I don't believe project admins can change the notification scheme associated with their project unless things have recently changed.
What is actually happening you're trying to 'fix'
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