And if your friend has not verified the watch, and you set it against theirs and tell your friends this time which you believe to be correct when asked, you are

And if your friend has not verified the watch, and you set it against theirs and tell your friends this time which you believe to be correct when asked, you are now unknowingly propagating incorrect time. In fact, if you get a bunch of people who, say, want to get up a bit later, they can band together to set their time deliberately wrong and influence as many people as they can to synchronise with their incorrect time (whilst all along pretending it is the correct time), and soon it becomes hard to know which groups are telling everyone the correct time, and which groups are disseminating the wrong time to achieve their political ends...