Ive already posted this in this forum, but here it is again.
I dont think nintendo would go as far as bricking peoples systems who have unauthorized virtual console games on them. If they wanted to brick consoles they could have already for other reasons. Instead they have tryed other methods as seen with the SMG stuff. If they do anything about this, it will more than likely be somewhere in the lines of re authorizing peoples VC games, and disabling the ones that are not valid.
Now this is what will really piss off nintendo, modders who load up systems with every VC game and sell them on ebay. Which would bring the cash value of the games way down. That is what will more than likely bring this to an end. What I am wondering, is can you install the games, then move them over to a SD card and just plug in the card whenever you want to play the games? Maybe disable internet connection before you insert the card? Not sure how that works but without internet they cant do much, alltho a game update, who knows.