It's wrong to use someone else's pictures without their consent.
Mark wants to advertise the new wigs from his store.
Mark wants to capture people's attention.
Mark asks his graphic designer friend to create a creative graphics for his store's twitter and website.
Mark places a picture of an instagram influencer with hair similar to his wig in an advertisement.
The pictures Mark uploads goes viral, and Mark sells out of his new wigs.
Mark is sued by the instagram model for using her picture.