…and hilarity ensues. Most people would choose to defend the advice that they gave, but how could I be so silly, how could you possibly defend giving that advice.
Alienating IE6 users is one of the most shortsighted, ignorant things you could suggest somebody do. Creating a site with broken functionality for 15% (if not more) of your users is ludicrous. It’s the lazy way out. Encourage people to upgrade all you want, but some users are simply stuck with IE6 and there’s nothing they can do about it. Remind them that there are new versions of things, but don’t provide them with a broken website.