Your product has a purpose, and that purpose should help you identify the information you actually need. Blindly or willfully grabbing information beyond that can subject your product to bad press, excessive government demands, or even financial penalties. Build trust with your users instead by only collecting information as needed.
Jay-Z and Samsung were publicly skewered when their Jay-Z Magna Carta App required so much unnecessary data from users’ smartphones that it “verge[d] on parody.” The app demanded access to a user’s dialed phone numbers, precise GPS location, and details about the user’s other apps. This resulted in a complaint with the Federal Trade Commission (FTC) and forced Samsung to publicly defend the app, all of which left press asking: “If Jay-Z wants to know about my phone calls and email accounts, why doesn’t he join the National Security Agency?”