I guess I'm in the minority when I say that this scares the Hell out of me.

We've already done immeasurable damage to ourselves through GMO food - why do we think we can actually help ourselves by tinkering with people?

Just because the science of the day says it's better or it's more socially acceptable ("preventing" disease) doesn't mean it won't be later judged to be harmful.

An easy example of this: margarine. In the early 1900's when it's popularity rose, margarine was hailed as a godsend because it was cheaper, didn't use animal-based fats and had a longer shelf-life. Now we know that our grandparents were really just pumping us full of cancer and heart attack causing trans-fats.