build a moat around the pond and put freshwater crocodiles in it
Time to check google earth to see if I can see my pond!
Some ideas....
It's a bit annoying, but...Get some very very light and cheap plastic or similar. Spray paint a green that is similar to your grass, or well grass coloured. And pop it on your pond at night?
Or phone google and demand they blur your house.
Or, do the first idea, but find out when the next google satelite image is being taken and put it on specially for the occasion.