This is something that I've found troubling as well. Every time a transaction is made via PayPal (even through the website) the app wakes up an attempts to acces the camera. It's not a bug - this kind of funcitonality can't come about by accident. PayPal's core service has to send a push notification out to any devices associated with the account when a payment is made, the app has to understand the notification and respond appropriately by accessing the camera, taking a picture, and (presumably, I haven't profiled it myself) sending it back to PayPal. This is very much an intended feature, albeit a pretty creepy one. At least Android users with Kit-Kat or later have the opportunity to block access using Privacy Guard. One presumes the same feature is built into the iOS app and iPhone users have no defense.
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