The most effective indirect approach is one that lures or startles the opponent into a false move - so that, as in ju-jitsu, his own effort is turned into the lever of his overthrow.
There's a lot of health information available on your smart phone. There's financial information. There's your conversations, there's business secrets. There's an enormous long list of things that there's probably more information about you on here than exists in your home, right. Which makes it a lot more valuable to all the bad guys out there.