At the time this episode originally aired, 12 January 1967, LSD was not an illegal drug in the United States. Possession of LSD was made illegal in the United States on 24 October 1968, and it was listed as a Schedule I controlled substance by the United Nations in 1971.
When Friday uses a match to light up his cigarette outside the courthouse, he strikes the match on the front of the matchbook. In 1973 matchbooks were federally mandated to put the strikers on the back.