Norm Feuti (born May 14, 1970) is an American cartoonist best known for his nationally syndicated comic strips Retail and Gil. (wikipedia)
The concept of a retail-based strip has great mass appeal, because everyone can relate to it, either as a former or current retail worker or shopper.
We had to make sure to take them down when he showed up.
When you think about it, a lot of people have worked at retail at some time in their lives. And even if you haven't, all of us have had funny or frustrating experiences in stores.
People aren't even aware of their own behavior. Maybe they'll finally realize if they see it in print.