"People use logos in the most absurd and ridiculous ways because they don’t really understand what they’re doing. They’d mess up hundreds of hours of design within a week if we didn’t give them brand guidelines.
It only takes a minute to destroy your brand
identity. We can spend weeks creating a look that will get you more
business but if your logo ends up being used in the wrong way, your
customers will get confused and disappear into the arms of the nearest
competitor.
One-man bands might be able to make sure their
corporate identity is being used properly at all times. However, a
business with lots of employees in different offices can’t easily police
how their corporate identity is used across the company without brand
guidelines." - Edge Design (Steve Edge)