You can have whatever settings your want for the cameras that are in mainly your account, or shared. But for the shared cameras, you share the same notifications as the main user of the camera. The settings follow the camera. That means if you have :
Your account, User A:
Camera A: your camera#1, notifs on
Camera B: shared camera#2 from User B, notifs off
Camera C: shared camera#3 from User C, notifs off.
If this is what you want, then this is also true:
User B: camera #2, their main camera, notifs off.
User C: camera #3, their main camera, notifs off.
I don’t have any shared cameras anymore but this is what I believed to be the correct behavior. Since you have this all set up now, get with some of the other users and test these behaviors. If you don’t want notifications from user b’s camera 2, and user b doesn’t want notifications from camera 2 either, then your good. If user c wants notifications from camera 3, and you don’t, then you and user c need to have a discussion. .
I highly recommend working with one of your fellow users that have cameras shared with you and spend time testing all your questions. I think that will give you a huge amount of clairity as to the results. Do update this thread with your experience though please. 