Yes, tank shells do bounce, like Panzer II's cannon at most other tanks.
But, will the stray bullets cause damage? I do remember getting thrown into the air in BF1942 FH0.7, after a 75 mm shell bounced off from T-34/76's front hull. I was standing in front of the tank, holding wrench when suddenly there is a ricochet sound, then it sent my flying high before falling to the death.