Leaving the ladle in the soup considered harmful? There's this belief in my family that leaving the ladle in the soup is bad, but nobody actually seem to know why it would be bad; it's really just a persistent piece of family lore. I never really cared one way or another, but it really started bugging me now that I've started cooking.

Is it just a myth? Or is it indeed harmful in any way to leave the ladle in the soup for any extended period of time? And if so, why? Food safety issues? Maybe outdated food safety issues from the times ladles weren't made of stainless steel? Or it's just seen as impolite?
Maybe because the ladle gets hot and could burn someone?