I'm gonna get crucified here but here's my old farts opinion...
I love animals.. I believe that if you accept the responsibility of having a pet, or pets, you must accept the responsibility of controlling them..
Nobody loves your pets like you do.. Not Grandma, not the neighbor.
If you chose to have dogs, and those dogs are the ones who have deservedly, or NOT deservedly gained a bad reputation for being dangerous (and pit bulls are at the top of the current list) you are asking for trouble.
I'm not talking about somebody killing your dogs either, I'm talking lawsuit time...
As to this specific case. I'm a believer in asking the owner of the vicious dogs ONE time to solve the problem.. After that I would never say another word to him. I would call Animal Control (if there was such a thing) and document the problem.... I live in the country, we don't have an Animal Control.. I have to be my own Animal control.. In our case I would call the Sheriff and complain about the problem to him..
After that I would never again breathe a word to anyone.. But the very next time the dogs came in my yard I would take my favorite High Standard 12ga. pump riot shotgun and kill 'em all..... (I prefer #4 buck).
If a complaint was filed against me I would say the dogs were attacking me and I defended myself..
By the way, I don't think pit bulls are deserving of the bad rep. they have. I have owned two in the past and they were sweethearts. A bulldogs aggressiveness is directly towards other dogs, not people.. It's a nature, "Alpha dog" thing.
I think you can make any dog "bad", and generally the problem can be traced back to the owner, not the breed.
I'm sneaky enough that if the owners of the "attacking bad dogs" were not home when I delivered true judgement to the dogs I would scoop the remains of those suckers up, put 'em in a large trash bag, throw 'em in the back of my truck and take them 50miles down the road to another county and deposit their worthless carcasses in the woods someplace.. I'm sure the buzzards would be appreciative.
But I'm not a nice guy, and I thank the Good Lord I don't live in some politically correct, brain dead, jurisdiction where a bad dog has more protection than innocents..
Oh yeah.. Chances are the Sheriff here would take me aside when I complained and tell me to shoot the "damn things" the next time they bothered me or my family.
Maybe it's a Southern thing?
Best Wishes,
J. Pomeroy