You may not retain or use, and must immediately remove from any Application and any data repository in your possession or under your control any Yahoo! user data obtained through the Yahoo! APIs not explicitly identified as being storable indefinitely in the API Documents within 24 hours after the time at which you obtained the data, or such other time as Yahoo! may specify to you from time to time, including pursuant to notification received from application uninstall event handlers.
Hi. If user wants to share league standings for example. He clicks to "share" and save data to application. Is it not allowed? It's sad.
We recommend against storing any private user information because our users need to be able to revoke permission for your application to access their data and trust that, you know, access to their data has actually been revoked. I'm sure there are grey areas that you can skirt, especially with data that isn't specifically tied to users (statistical data, for instance), but I'd assume that if we received a complaint from a user about not being able to remove their information from your application, then we'd have to fall back on the clause in the TOS that you listed and act accordingly.