What I do think is that dog owners frequently don’t read the situation. An example of this is yesterday a very excitable (absolutely adorable) and very large puppy off the lead, met a mature labradoodle, Alsatian, a couple of chows and my dog - an elderly cairn, all off the lead.
Pup began to wind up the mature dogs who in turn started to get very excited. Not Duncan as he’s 14 and very little phases him. They then started to tell (as is normal) the pup off, but you could see the situation beginning to get tense. I grabbed Duncan and one by one the owners did the same. The situation immediately started to calm as the owners got control.
It is essential imo that owners are in control at all times, and if the dog won’t behave then it remains on the lead.
I met the massive puppy today and his owner (I haven’t a clue as to his breed) but she said that he suddenly has started to misbehave and refuse to come back etc. guess what? He is 8 mths old - a teenager in puppy age. They all go through this stage, but can be absolute pains until they mature.