If you've ever been a freelancer or worked in some sort of agency which deals with individuals or small businesses, you'll know how crazy clients can be. Some of the stuff they come out with and their logic of thinking is just horrendous, it's no surprise the majority of small businesses fail.
Unfortunately you just have to learn how to deal with these clients and talk to them like children so they understand what you're trying to say and why something might not work.
These 72 posters were made by Mark and Paddy, a digital media agency. All these quotes here are from actual clients that they and others have had to deal with.