To answer the OP yes and no. Well, actually, yes and I don't know.
Both Maddie and Missy would make A LOT of noise, poturing, hackles up, teeth showing, walking toward the other person, threatening glares, etc
This happened once while I was walking Missy at the park, and this guy turned around and flashed me, and took like two steps toward me. I don't know if he didn't see Missy, or what. But she made herself heard, and he learned his leasson!
And with Maddie it was in my own driveway, when a man came out of the bushes and approached the car. She saw him before I did... TG
But would they go beyond that? I don't know. I could say yes (most owners like to), but its never had to escalate that far because the noise is enough to deter people - and that's all I expect.
I think its funny that people talk on the forum about how well socialized their dogs are and stuff, but then when threads like these pop up they've had
soooooo many times when the dog has put there teeth on people
That is not okay in my book. We should learn to protect ourselves, if need be. And not leave it up to the dog
JMHO