Easier to coordinate a deployment for, and affects all users, not just installing one. It would also allow you to control the messaging users see when they open your app and it only loads the walk out day screen.
Why not just display the message and then allow users to use the app.
Punishing the users of an app for the behaviour of the store, while attention grabbing and potentially impactful, seems a bit like chucking the baby out with the bathwater.