I sometimes grow weary of the trickery that some businesses employ to increase their bottom line profits. My personal response to this type of tactic is to stop doing business with them and spread the word on sites like TTOL. When others are better informed they can make better choices.
IMHO there are lots of creative ways to generate additional sales without resorting to unethical actions.
Sorry for the sermon but after spending all of my career in sales and marketing I still remember the difference between right and wrong, without the questionable "spin".