Sorry to hear about Skyler,
Blues
. Hope she’s well.
I’m also sorry you have bad owners in your neighborhood. I owned a dog that, very specifically, became male dog aggressive as he got older. Fortunately, it manifested in our own backyard. The offender was put down the next day. I wasn’t willing to own a liability, even with our six foot fence.
There are different types of aggression and this dog wanted to kill not subdue.
My dipshit dog, Smudge, has nipped a few people. He has some fear aggression. I think I’ve mentioned it before, he may have some vision problems. He never actively goes after anyone. If new people try to pet him before he gets to sniff them he may nip as they reach for him. But it’s always nip and run away. If they just ignore him for a minute, let him get some sniffs in, then he is fine. Any one who approaches him, especially women, using a sing song voice and he’s instantly their friend. Even if he’s never met them. So, he’s a liability, but a minor one.
You should carry pepper spray also - because you don’t need a clear shot.