I'm not sure it's all that hard. It's never been a great idea to make core user flows reliant on modals (by all means use them, but make sure you either practic

I'm not sure it's all that hard. It's never been a great idea to make core user flows reliant on modals (by all means use them, but make sure you either practice progressive enhancement or have a fallback). Sites doing so are at risk of failing their users. That said, I'd love for a solution akin to popup blocking: block the popunder but alert the user that it happened and allow them to show certain ones.