Yeah, and the worst part is this has nothing to do with dogs. It is all about IDIOTS with dogs. The dog was having fun while you flew above him. The dog doesn't know better, and shouldn't be expected to. The human is your problem, and a very difficult one at that.
I am SO sorry for you, and that's worth jack $quat.
But, I regularly use value as the threat. I wonder if you had said, 'It's a 400 euro kite...you got insurance?', what he would have said afterward. I also regularly get aggressive first. 'Sorry, but you better keep your dog away from my kite, or you'll owe me 400 euros' works well for me.
Still, this SUCKS!!!!!!!!!
"When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return." L daVinci