site-wide alert exceptions?

Is there a way to tell NPM and SAM to not alert if a node or app is unmanaged in one place rather than edit all alerts one-by-one?

Say, I want alerts on nodes and apps that are not up and build a number of different alerts that do different actions based on node/app tier, core application, location and other parameters, and say, I have 23,000 of those alerts. (No, I only have 25 - but still.)

Now, I do not want alerts on any node or app that is unmanaged or in maintenance - or perhaps external.

Is there a way to apply these alert exceptions to all existing alerts in bulk rather than edit them one-by-one?

Thanks.