years ago I read an article by bruce schneier talking about how he ran an open home network so if someone accessed illegal content he could claim it could have been anyone. His argument was that if it was secured the police would argue it had to have been him.

I got the point but disagreed.

a year or two later I was reading an article about a police officer that got convicted of accessing child pornography on the police computer systems. The chief of police was quoted as saying "we know it was him because he used his password".

My ass went home that night, opened up my home network, and I've ran it that way ever since.

of course it's not that simple, understanding why that chief of police was wrong (I'm not making any claims about whether that police officer did or didn't access that material) in his confidence is what caused me to suddenly strongly agree with Bruce Schneier.

So when I hear things like your dog story, I just know that confidence has to be misplaced, even if I don't fully understand why (although in this case I do).