Apple has removed a program from its App Store called Metadata+, which sent users text updates and map locations on every covert lethal US drone strike around the world (that we know about). It deleted Metadata+ for "excessively crude or objectionable content." The creator of the app, Josh Begley, also operates the @Dronestream Twitter account, so you can see what kind of content they found so "objectionable":

Sources: The Independent | Dronestream