I think some neighbor (or more to the point teenage children thereof) walked onto his property and performed the vandalism.
Dave is better equipped to discuss his property security that I. Although I've been to Dave's place numerous times I'm usually so glad to see DIED and DWIED that I don't pay much attention to my surroundings.
On thing is for certain though, you have to know DIED's pond exists or you would never find it. Dave's place is at the end of a road that doesn't lead anywhere else. There are multiple no trespassing signs that you pass along the way. You don't see the pond until you are practically right on top of it. IMHO the people that did this knew the pond and more to the point knew that DIED and DWIED had left for the day - sadly to go to a winery and then check up on my place - a day that should have been nothing but fun.
