I hate when people do that, Tango has leash aggression and hates it when other dogs come anywhere near her while she's wearing a leash unless she knows the other dog. I never let any of my dogs off leash unless I'm at a place where I know they can't get hurt but even if I have her off a leash and another dog comes by I still call her back and put her leash on until the other dog leaves. Also when I'm walking her a guy with a pitbull and a dobie lets them run around in their yard but as soon as they see Tango they run across the street and the dobie almost got hit by a car 3 times, and as soon as I see them coming I stop because the other dogs will chase us around until he can sniff Tango and the guy who owns them always says it's okay, they're friendly and I say my dog doesn't like other dogs running at her like that and then he says I am just one of those stupid people who think of pitbulls and dobies are out to kill somebody.