You haven't shown me one statute or BoR amendment guarenteeing a 'right to privacy', nor have I ever seen Eminent Domain abused. Southack has; I trust his story to be true. So it does happen, but we write laws for the ideal. To write laws dedicated towards corruption is insanity.
And the use of these laws is very local. I personally would make it a point to ensure they are used justly.
You are sounding a lot like the gun control people -- "Eminent Domain might be abused, BAN IT, for the children! If it saves ONE PLOT of land, it's worth it!".
Eminent Domain is a morality-neutral tool. Make sure your local lawmakers do not abuse it. I have never personally seen it abused.
There are lots of cases, I can tell you about some if you're bored.