I'm wondering if the evil solution is to update the app in such a way that it no longer complies with the rules and get yourself banned from the app store. Although that has other risks to your other google accounts.
That will only cause the update to be rejected, leaving it on the normal version. But maybe you could make it non-compliant by changing server-side content without an app update.
No, there is no requirement to support the software, at least according to what we've heard here. Simply that you can't remove your current rev from the store - you can't prevent people from downloading it.
That's a bit misleading. You can unpublish the app[0], which hides it in the Play Store and prevents new installs. It just doesn't remove the app from the people who already have the app installed, and I think they'll be able to install it on new phones.
I don't know why the OP is choosing not to unpublish the app.
...and yet it was enough not to verify my account (which I didn't do because it included consenting to my address being shown) to get it removed with all its apps.