I looked at Shoreham's history briefly before answering, and although it opened and was called a commercial airport in 1911 it looks like it didnt start passenger flights until October 1932, and the question is asking for oldest passenger airport.
its difficult in print poortony to know how to take things sometimes. I always assume it is lighthearted. After all we are all amateurs here. Once a poster asked if we all worked for answerbank. I loved that idea!