For me it is when companies/services market themselves as donating to XYZ cause if I buy their product. If they want to donate, they should have already done that with the money they have. Asking me to give them profit so that they can donate is so obviously pretentious.
Yes I hate teeth whitening in general. I really dislike that unnatural shade of white. What gets me of their advertising methods is that they usually prey on people’s insecurities based on the myth that the whiter your teeth the healthier they must be.