Curiouser and curiouser: what does it mean to go ‘down the rabbit hole’?

Radio 4 has just run a series of programmes called Marianna in Conspiracyland made by its disinformation correspondent Marianna Spring. Prefatory remarks for one episode asked: ‘Do you know someone who’s fallen down the rabbit hole?’ I think this phrase has changed its connotations recently. The reference to Alice in Wonderland is evident. The podcast reinforced it by quoting a phrase from the book, ‘curiouser and curiouser’. In Wonderland, Alice had mixed feelings: ‘I almost wish I hadn’t gone down that rabbit hole – and yet – and yet – it’s rather curious, you know, this sort of life!’ The OED, finding a first usage for it from 1938, defines a figurative rabbit hole as a ‘passage into a strange, surreal, or nonsensical situation or environment’. One illustrative quotation it gives from a newspaper in 1997 says: ‘Down the rabbit hole again, and into the surreal world of City politics.