You’re not alone.....
The one I'll always remember was the guy who told me to smile just after I'd left the Chaplain's office. I'd just been notified that my father had died unexpectedly, and I was rather in shock, and this guy told me to smile. I told him about my father and he scampered away, mortified. I do hope that he, at least, never again ordered a complete stranger to smile at him.