The photos are very cute and I enjoy them as well. BUT, by the time the dog shows aggression, it is too late.
If you think a child's life is no big deal, then I hope you don't have a kid.
Dog bites occur thousands of times a day and often-times by dogs that never previously have shown aggression. Most dog owners have absolutely NO clue about animal behavior and what to look for. Everybody seems to be anthropomorphizing their pet and seem to think that they understand the dog's behavior as if it could directly be related to their own. Sadly it is not the case. Pack hierarchical behavior is not generally shown in humans with the major exception of street gangs. These photos, as cute as they are, demonstrate pack hierarchical behavior in spades.
I am not interested in a flame war. The evidence is out there and easily found with a little effort.