Dangerous for short pieces, sure, but how do you think we coped when all timber came as waney edged? We cut by eye to a line on the plank and if the plank had tension in it we had to hammer wedges into the saw kerf behind the riving knife. There is an awareness of the fight between the wood, the machine and yourself. The bigger the machine the more respect you give it, but never be nervous as that is also dangerous, you have to be boss of what you are doing and respect limits and watch for dangers like stop to remove a wedge shape offcut that could become a projectile delivered by the back of the blade, but less likely with a crown guard. Safety is not only about keeping fingers away from the cutting edge." unless cutting to a line without the fence."
I always thought this is also very dangerous - others with better knowledge will confirm or otherwise