Hot l Baltimore was a very controversial TV show for ABC.
I recently saw a audio clip of the show's theme song. An announcer said that "Our program deals with mature subject matter. Parental judgement and discretion are advised." This is one of the many reasons of the poor quality of the audio. Other reasons for the poor quality are that it was only seen in its original run on ABC in early 1975 and was never picked up for syndication.
The reasons that the show dealt with mature subject matter is that it had 2 men who were one of the first gay couples in an American television series, and 2 prostitutes.
If the sitcom were to be syndicated today, the show would recieve a TV-14 rating (not good for a classic TV series). But a classic show has to be rated either TV-PG or TV-G. There should be an edited version of the sitcom with a TV-PG rating.
Nobody remembers Hot L Baltimore as of today.