Didn't realize how vulnerable even a simple NSLog was... I wonder how many websites have sensitive information they console.log but forgot to take out for production
Remember when the iPhone was under fire for logging everywhere a user went? That was due to careless devs logging location data. Also, logging data is a blocking operation, so if done too often it slows the performance of an app.
CORRECTION: the 3rd party apps were part of it, along with Apple's own logging, when reported in the news.