It's only considered bait and switch if you can prove you received the e-mail offer. Most other people never received this offer. They went on some deal sites and click on the link that cannot be found by navigating thru BB website. They should be taken down but the people who can get there are people who read the deals on other websites.
Remember all it would take is a public announcement about the mistake and Best Buy will be off the hook. Best Buy is allowed to make mistakes and correct them. They are not legally obliged to honor mistakes.
the BB people on their facebook and twitter feed stated that it was for anyone's use... also, there are several people here that rec'd an email and were turned down...if you make a mistake you fix it first, then you deny the coupon...you don't keep posting the coupon, and have people keep coming in with no signs whatsoever...my BB as well as others had no signage when all this was happening.