How to set the notification level for all members of a group or project to "watch"

I am wondering if there is a possibility to set the notification level of group members to a new default, different from “participate”.

Background:

We are sometimes working with people of varying technical skills and only use the Issue tracking and Wiki functionality (and the newly added great boards) for these projects.
So when inviting a new member to a project their default notification level will be participate, hence they will only ever receive E-Mails if they actively join a discussion. Because most of these people are so used to reading e-mail they will only rarely login to see progress.

I can see how participate is a sane default for most use-cases, however being able to configure this on a per project or maybe per group setting would be very useful to me.

At the moment what I* do is as follows:

1. I login as admin
2. I goto the Admin’s User listing
3. search for the given user, open their profile
4. I impersonate that user
5. navigate to the project and manually set the notification level to watch

In case making this setting configurable is too much of a corner-case, maybe there is a more efficient way to manually set the users notification level.

@micheee have you found a way for this? I have the same issue.

Unfortunately not, but I never bothered to check if in the meantime there is another way of doing it