Unnatural selection: Is evolving reproductive technology ushering in a new age of eugenics?

Link: http://www.theglobeandmail.com/life/parenting/pregnancy/pregnancy-trends/unnatural-selection-is-evolving-reproductive-technology-ushering-in-a-new-age-of-eugenics/article2294636/singlepage/#articlecontent

Summary: Like the movie Gattaca, we are now moving into a time where people are able to make babies that have certain features.  For instance, a couple could choose to have their baby be male, blue eyes and brown hair.  Like in the movie, DNA readers a being made to read what traits the baby would have.  The ability to have such power of a future child blurs the line between health and enhancement.  However, with this technology, the world would be free of genetic diseases and other such problems.  This defies the natural selection order, and it will be our next step in evolution.

Question: Should humans use the ability to defy natural selection?