During my time producing a TV series years ago, I became far too familiar with a term I'd previously heard used only in passing:  stage mothers.  These were moms – and sometimes dads – who not only lived vicariously through their acting offspring, but worse, used them as a primary means of financial support. It was only after my first-born son fell in love with baseball that I learned there was a correlative of sorts:  baseball dads.  What they share with stage mothers and fa