I've done a bit of personal protection training with Judge. He has been tested both in the house and in the car. He is not a dog that barks when someone knocks, but he does rush the door. So, if someone came in my house unannounced and I was home, he would rush the door and do a hold and bark, if they pushed past, he would bite them. He proved this through training and also when an ex guy friend walked in my front door while I was in the shower, mind you guy had only met the dogs once and was told to call when he arrived. His fault. His use of force was completely appropriate for the situation.
In the car, he has never had a real encounter, thank god. He is a beast in the car. He is normally crated in the car for this reason. But when he does ride loose, he will guard it with his life. In training situations he has proven time and again that no one is getting in the car with him in it.
LoLa, LoLa,LoLa....her temperament isn't what some would approve of for the APBT breed but she is a solid stable dog. She is friendly and sweet but she would protect me if the need arose. She is a horrible car guarder as well, as long as she doesn't know the person at all. If she has met them even once, then they can climb in the car and do whatever. At home, she rushes the door barking and growling. If I was in danger, she'd protect me but I highly doubt she'd ever protect the house.
Hobie is getting softer in his old age but he would protect me with his life. I owe my life to him actually. I was in a very abusive relationship when I was younger, Hobie attacked my ex to stop him from hitting me allowing me to get to the phone to call for help.
Some people wouldn't want their dogs to act like mine do in certain situations but I love them and appreciate each and every one of them.
That said, Hobie is the only dog allowed free roam when I'm not home. He isn't a threat to anyone because he isn't a territorial dog. All 3 of them sleep loose in the house though, Judge and LoLa in my room and Hobie in the main part of the house. I figure if someone comes in at night uninvited they deserve to be bit.