This can be the quickest solution to potential noise disturbances. The problem lies in visibility and the honor system. If the sign fails grab the attention of noise makers, then the sign becomes ineffective. Also, the noise makers may not respect your request even after reading the sign and continue to make noise. Either way, this phrase has become novelty, just look at the variety. Not to mention, the different additional meanings that people have attached to “Do not disturb.” Also, there are many different noise control signs that are posted everywhere. Just look around and you’ll see what I mean. Especially in urban areas, silence is hard to come by with residence living in paper-thin walls, sometimes. Soundproofing your life becomes necessary at times.