App developers find out about this practice as it gets more commonplace. They add a check for 'empty' data or resolution failures. If these checks notice that you had been providing null or fake data, the app now gives you an intrusive yet pleading popup to please lift the privacy measures.

You get annoyed, resenting the fact that your friends are using this piece of garbage. Reluctantly you lift the measures, forget about it, and just keep using the app.