Germany 1970's TV show, national. Arrived late and had one clean shirt in bottom of bag, as it was the end of a tour. Quickly changed, ran in to studio, took marks ready for broadcast live in three minutes. I felt a cold atmosphere. Checked fly, etc, all okay. Ten seconds before going on air to sing a jolly song I glanced above me at the monitor and saw that the director had zoomed in on a badge sewn on my shirt pocket (sewn on badges had been a fad a couple of years before and I'd forgotten about it).
The programme started with that image as I began the song.
The badge was the Star of David, with "Never Again" underneath.
Now, the sentiment was fine by me, but I must admit there's a time and a place for everything.
They were very polite afterwards, but I drove without stopping until I crossed the Dutch border!