Yeah, and I have opinions about [3].

I think pretending you didn't use AI, when you did, is unworthy. So I'm not trying to make posters that fool you into thinking it's handmade. I'm trying to make AI posters that aren't crappy.

I've got some AI writing too, and I don't try to remove all the clues that tip you off it came out of an LLM. I only try to remove the tics that make it read badly. And I present the work upfront as being AI-assisted.

The only problem there is, in the real world, there's a cohort of people who don't think "that looks crappy because it's AI" so much as "I don't care if it looks great; I object to AI on principle; I now hate the thing that poster is advertising". If you cared about that cohort, I guess you'd either lie about using AI, or simply not use AI. But I kinda wonder how long they'll still be around.

Mexican Calavera, you picked up on - might be one of the weakest, as it seems to apply a Day of the Dead layer on top of "default ChatGPT crappy cartoons".

I'd argue nobody in Great Britain would have a Mexican Calavera themed event at a cricket field, never mind the clearly USA-style building in the image.