@Eckhart
You can't, because your preferences aren't rules or laws. I might not like children, but I can't expect society to keep me protected from them. It would be my preference, and therefore my own responsibility to keep my required distance from them, even if they approached me
Several times on this thread people have been told if an unfamiliar dog gets too close to them they should stand still and turn their body away from the dog, but definitely not try to get away as this could provoke the dog to chase (not usually an issue with children). So how am I supposed to "keep my required distance", whilst also protecting my child who, being 3, may not robotically observe the protocol?
Also the difference is (a) children very, very, VERY rarely approach strangers, and of they do they certainly won't be touching them, stealing food out of their hands or wiping body fluids on them, not least because (b) parents are very rarely far enough away from them for this to happen before they do something about it, and (c) a human child cannot,generally speaking, main or kill you if it chooses to.
Honestly. It is the dog owner's responsibility to ensure their dog doesn't interfere with other people. It is NOT some collective societal responsibility for strangers to manage your dog, any more than it was anyone else's responsibility to change my child's nappy. Why will dog owners not accept this? And those that do accept it but say because THEIR dog doesn't do it, then placing any additional restrictions or enforcement on those whose dogs DO, isn't fair, you are also basically saying that for your convenience, the non-dog people just have to put up with the shitty dog owners.