onlyone if you are a high risk target I would recommend against allowing this at all costs. there are far more sophisticated attacks much beyond what can be done with the publicized femtocell debacle.
AcclaimSublevel19 A simple and effective solution is installing the app and (even though it's harmless) immediately disabling it. Even if it were malicious, it can't run that way. As a bonus you don't get 50 prompts a day.