Prohibition refers to a time when alcohol was illegal, and it can also mean the illegal status of a substance or activity. Prohibition quotes from gangsters who ran booze can be very interesting to read. In the USA there is a prohibition on many drugs, and the prohibition era was a time of violence and illegal activities because Americans were not going to quit consuming alcohol just because the United States Government outlawed it. When something is the subject of prohibition there will always be a black market for these prohibited things, and that drives the price up and allows criminals to profit. A prohibition is something that is forbidden, and this status could make a substance even more appealing for teens and young adults who are going through a rebellious stage.