Option to disable notifications for STI class

[seancdavis]

Consider the case where you have a handful of model inheriting from one parent model. If the children all can share notifications, then it makes sense to set the notification on the parent. This still applies in the case where perhaps one child may differ from the rest. It would be great to be able to disable notifications for that child.

[digerata]

My 2 cents:

It might be safer to disable all parent notifications as opposed singling out individual parent notifications to disable. Otherwise the definition of what happens is spread across multiple classes. (Which, is a core tenant to object oriented programming, I get that...but still)

If we go that route of disabling individual parent notifications, the syntax should be as clear and concise as possible.