I never sign in to websites with Google unless it's required. Meanwhile, these popups around the web are not only obstructive and visually annoying, but a reminder of the fact that Google is trying to track me. It would be very cool if Orion offered some way of disabling them browser-wide — visually as well as preventing the call to accounts.google.com.
There may also be other services like this which might want to be blocked; I'm not sure to what extent other integrations phone home if the user doesn't initiate a sign-in manually.
I suppose I can achieve this using an extension, but it seems like a pretty big hole in Orion's blocker. But maybe it's not worth the work of including?