[Ameo]

This is the _exact_ scenario described in the novel Permutation City by Greg Egan. There's a whole little spot devoted to describing one of the character's setups for having their own little agents to pretend to be them in order to fool agent-powered spam emails into thinking they're being read by a real human.

The crazy part is that book was released in 1994! Iirc Greg Egan isn't a big fan of modern "AI", wishing instead for a more axiom-based system rather than a predict-the-next-token model. But in any case, I was re-reading it recently and shocked at how closely that plot point was aligning with the way things are actually shaping up in the world.

The timeframe for this happening in the book was 2050 btw