I've had issues installing other games enough times, and what I do is go look for a fix. Anyone who isn't absolutely computer braindead will go to the official website and/or best fansite and look for a fix. I'm not saying I'm impatient and can't wait, just bringing up a point. This is a tiny, tiny, rare bug. There wouldn't be mass chaos because there was an issue, especially if a FAQ was available on the official site and whatever else.
IMO, having a well done and tweaked tournament mode is more important than a rare bug that is easily warded off with simple warnings. I think you guys are blowing it a bit out of proportion, but again...I don't mind waiting a day or two for the MP release if they want to be more professional about it, but I still think your points are invalid. People are dumb and make mistakes, but people don't immediately throw up their hands, vomit, tell everyone the game is shazbot because they can't install it, and not look for a fix. You might get the occaisional idiot who posts doing that, but then you have about 20 people telling him he's a tard and to get the fix.
Dunno what to tell you, I think you guys are exaggerating how bad this bug is. A game destroying bug would be one where it would not only make it unplayable, but you couldn't reinstall it or remained unplayable even after installation. Take the number of people who actually fall for this bug, sift that through the people who don't bother looking for a fix or reinstalling the game, and immediately return the game, and I guarantee you have less than 1% of all customers, and that's a generous estimate.
Edit: And if you include a BLATANT warning screen upon installation, most people read it. And if they don't, who's fault is that? There's only so far the developer needs to go to prevent stupidity, then it's all on the fault of the dumbass customer. If you have a blatant popup warning on the demo going "WARNING: UNINSTALL THIS DEMO BEFORE INSTALLING THE FULL RETAIL VERSION, OR THE FULL RETAIL VERSION WILL NOT WORK" in big letters, I think you'd get the point across.
Lastly, why are the devs only responding to stupid shazbot and not valid questions?