Split hypenated last names

Today, more and more people are named after both of their parents.
Names like Spice-Roy might be prevalent in the case that the mothers maiden name was Spice and the father Roy.
In fact, I do think this is a neat thing, but personally, I think that it should only be for the daughters.  A son should take his father's name.  No alteration.
Thus a son of a Dr. Sapter would be Mr. Sapter.
If a daugher is born however, I think that it does in fact look postive if she takes her mothers name and fathers name in certain instances.
I think that you could pass this from generation to generation, but in successive generations, the daughters should continue the mothers name line and drop the grandfathers name.
Thus the daughter of the marriage of say Dixie Chever-Barton and Drew Becner would be say Pixie Chever-Becner.  Barton is dropped.
Seems like a fun situation to me and perhaps there will be more hypenated names.