I must say, the thought of Voldie kicking himself (well, wanting to, but he couldn’t because no legs) while spending nine years as a disembodied spirit in the Voyager Plaque was extremely amusing.
I also loved the fact that his Voldemort persona was designed to be a stupid Dark Lord that would last weeks at most and ended up being way too strong for Magical Britain.
That’s not how inbreeding works, though… If one of your parents’ family (in Voldie’s case, his mother) has been inbred for generations but the other parents has a completely different gene pool, then you should be fine. Inbreeding just makes it more likely that you have two of the same recessive allelle (which is bad in many situations), but Voldie only got one of each from his mother.