None of this UncleBob help fight counterfeiters. They would have the means and ability to identify and strip out any such code.
You know, I'm sure counterfeiters do make a dent in sales and profits - but, at least, there's a hard trail to track these people down.
You don't have that with downloadable ROMs online. There's scarcely any kind of traceable trail to follow up on. Between the people uploading and the people downloading, you simply can't go after every person with a Guy Fawkes mask on.
After 1) and 3) they are going to rationalise that it is 2). Instead of a message saying don't pirate games, go kick your friends arse for give you one or the seller for selling one, it will all look like a hardware failure.
I would assume, instead of just bricking the system completely, the hardware would give a general error code. While I was joking about my "You are a pirate" idea above (but seriously, I would lol so hard if Nintendo actually had the balls to implement something like that), I would expect something like "This device has experienced an irrecoverable error. Please contact Nintendo customer support for assistance." At which point, you can have a little chat with Nintendo about what you were doing when the system failed.
Once again none of this asks what happens with the false positives.
On the off-chance that, somehow, this "KILL" code managed to get into a legitimate game? You know, I would just have to trust that Nintendo's Q&A would check for this before authorizing the carts. As MegaByte said - there's software out there now that will brick your Wii... yet none of it has managed to make it to the market. But, if it did, then, again, I trust Nintendo to honor repairs and replacements.
Bloody hell UncleBob, you are acting like some back country sheriff that has received some federal funding and access to the arsenal of national guard surplus. You got the gear and just itching to use it because you can. "Lets go bust down the very next house we can get a warrent on".
Maybe I'm just tired of companies like Nintendo being told to suck it up because some people feel that the law doesn't apply to them. People who cry out "but that's not fair!" at the thought of Nintendo doing something like this all while unfairly and illegally downloading as much as they want. It's bullcrap. If pirates get to resort to illegal tactics, then they shouldn't get to complain when Nintendo punches back.