Lol, Attalus, been there, done that. My parents used to keep border collies, and one, Gaz, used to be quite vicious. Anyway, once, some guy came round about census forms, and couldn't get an answer from the front cos everyone was out and I was in the garden. Anyway, he came round an alley that led to our back garden, and just decided to let himself in through the back gate. I was varnishing some doors, and Gaz and the other dogs were watching me. Gaz lept at the census guy, and I had to grab him by the collar just to stop him biting the guys knees off. I was so damn p*ssed off that this guy had just let himself in that I was seriously tempted to let Gaz go and get back to varnishing
But hey, if that happens, the dog suffers more
