Not generally a deal-of-the-day site, but Polsteins Home and Beyond did a couple of days of Mystery Boxes, indicating in their descriptions that they would contain random items that they caerried, stock overruns, etc. Instead, they shipped a bunch of dollar store cr@p worth about $5 total (after charging, I think $10+shipping for the boxes), much of it broken or hazardous (e.g. badly leaking batteries).
They got such a resounding amount of bad publicity, they publicly announced that they learned their lesson, and the NEXT box would contain better items like they promised. Next round, they sent out about $6 worth of dollar store cr@p. Lots of unhappy people. I still won't buy anything from their regular store either for the way they treated all those customers.
Flings flung:
Too many to list at this point