Usually when people share a post, it’s because the post evoked a reaction, and they want to share that with someone. Making the conversation about the provenance of the post truncates the exchange in an unsatisfying way. For a news story, propaganda, or the like, the source is important. For funny dog videos? Maybe the quality of the exchange is more important. A nice middle ground would be to react as if it were true, and then point out it’s probably AI. Videos are easier to spot, but the difference between an image that’s obviously AI and one that looks real is like 10 min of work in Photoshop. So we’re often better off saving our faculties of discernment for the stuff that matters.