Hard reset doesn't have anything to do with this since it turns back on afterward. As far as letting the battery die, I think it's going to be much more common

Hard reset doesn't have anything to do with this since it turns back on afterward. As far as letting the battery die, I think it's going to be much more common that someone loses their phone, the battery is dead, and this helps them figure out "whoops, I left it at the bar we went to after dinner." The power reserve for this only lasts a few hours, but if you don't want that feature you can turn it off.