I think juice jacking is one of those things that's about a lack of real engagement about risk. Yes it's all very 007 to plant a dodgy usb charger, but it doesn't really reflect the real threat profile in the world. If you're just an average guy the biggest risk to you of someone stealing your phone and accessing your data is having your phone out as you walk through a city and someone will just snatch it out of your hands. If you're a head of state you should be more worried about someone like the NSO group and you should be operating a whole host of security practices. And as well as all this remember - the way Stuxnet was delivered wasn't some subtley planted infected phone charger, they had a mole on the inside who inserted the infected USB stick in the full knowledge that what they were doing was breaching security.