In my stroll through the internet looking for loose dog at campground stories, it's amazing how many ignorant careless owners there are out there. A guy on one forum was basically like, "Get over it, if my dog wants to bark at you or run over and 'say hi' that's his right and you need to quit being such a grouch."
Then there are the myriad owners who insist that "their dog is friendly and would never hurt a fly", completely disregarding the fact that the person the dog runs up to and jumps on doesn't know that.
I am way less alarmed by small dogs than large dogs, simply because of damage done. A small dog might bite you, but it's unlikely to kill you or your pet or cause major damage the way a larger dog can. HOWEVER your ankle biter needs to be on a leash as well. One lady insisted that her Yorkie could never hurt anyone and she promptly got her ass handed to her.
Anyway, people are stupid.