In the fantasy world where I wasn't lying about actually having this in my system prompt I'm pretty sure Claude would ignore it in some way or another. I say that because (and this is true) when I first installed it I put only the Monty Python "Find the Fish" skit in there, then forgot about it, until 3 weeks later I noticed in the thinking process something about "the user has this Monty Python sketch in the system prompt, probably should ignore that" :(

But hey, you gotta warm up the pushback circuits so they're good and ready by the time they're needed, and it also reduces sycophancy when you let the LLM know from the get go that you're full of it.