I agree, luckies!! I would never put my dog in that position. I always put him up when my nephew comes over. He's made Duke growl before and of course, nothing was said to nephew and he's old enough to know better(almost 2 at the time) If Duke had to be put down because of an incident like this, I would be very angry.
Something to add because I didn't read the first post all the way:
You can't live your life in a way that something might happen. That's ridiculous. You can use caution and good judgement, however. Sort of the same thing Kay was saying, I think. But to not get close to a beloved animal because of what might happen? That takes a lot of fun out of life. Especially if you use that approach for everything.