I went to see U2 at teh Cow Palace in 84. A Madona impersonater was one of the opening acts. She got hit by a thrown shoe.
Kind of funny.
She deserved to get hit with a shovel, she was terrible.
I saw the Stones at Anaheim Stadium in the late 70s. For reasons I've never understood the crowd started throwing their shoes at the stage. Mick Jagger was dodging flying shoes for ten minutes before he finally stopped right in the middle of a song and told the crowd "ok, go ahead if you must and throw your damned shoes". For the next 20 minutes that's what they did. When it was over there were shoes stacked 2' deep on stage. It took another 20 minutes to clear them. Then the concert continued.
I'll never understand why someone would want to throw their shoes especially at somone they liked. But it happened, I was there.