The best ones are people asking about food product photos, because for that genre of image the answer is almost always "not AI but also only real in that there is an indexical relationship between object and image, and even then it's likely been mucked about a bit"
browsing reddit is absolutely not good for me, but I cannot resist the fascinating window into how other people think. My current unhealthy obsession is "is it AI?" posts because some people incapable of thinking of outside the binary of real/ai ignoring other ways something might not be "real"