The SMILE shutter is a feature I wrote off as fluff. But at recent family gatherings, it turned out to be a hilarious/fun feature. Once you explain the feature to the photo subject, they literally go nuts and make the funniest expressions to try and make the shutter go off - priceless photos. Practically speaking, as a photographer you are trying to get that off-guard moment and here they are letting loose. The novelty will wear off but it should be good for a few golden photo opps
Now you pretty much have to show us a few examples. You cold always put a black rectangle across their eyes to protect their privacy.