Q: Why can’t you trust people with your phone?
A: Your phone contains your private data, possibly sensitive business information, passwords, credit card information, banking information, a record of all calls, website visits, very possibly a map of your movement/travels over the past x months.
Do you want this information freely available to someone? Even if trustworthy?
Then there is the problem with trustworthiness. How many times have you seen people who appear to be good, do bad things? I’ve seen good friends prank other friends putting malware on their systems. And then there is the occasional sociopath.
You may not have any incriminating data on your phone, but there are things that are better left private. Think using the bathroom – nothing going on there that everyone else isn’t doing. But do you want a webcam pointed at your toilet?
Ok. For some of my readers that isn’t a good example…