Including a "disclaimer" at the beginning of an essay

It becomes apparent very quickly that she talking about colors, in particular yellow. This is the beginning:

"Warning: this essay contains extreme color bias that may be offensive to some viewers. Viewer discretion is advised.

Colors are an enchanting part of life, though they often go unthought of. Having seen them every day of our lives, we often dismiss the vibrant shades of color that surround us. The sky is blue - though really, it is sometimes blue, and other times white or grey, pink, orange, or red, purple or a deep navy. Grass is green - though really, it is only sometimes green, and is far more often a shade of brown, or yellow.

I have always harbored an express dislike for the color yellow."