Being a superuser online is a far cry from holecarding live poker games, where you'll generally only know one or two opponents' hands (even though that's of course a massive edge, as well). I've been in a few live poker situations where holecarding was easy enough, but I always point out flashes. To me, it's a totally different issue from house-banked games, and as foolish as some people may see it, I won't use that kind of info in a poker game.