Sure, you can always remove it, but an average person posting AI images on Facebook or whatever probably won't bother. I was skeptical of Google's SynthID when I first heard about it but I've been seeing it used to identify suspected AI images on Reddit recently (the example I saw today was cropped and lightly edited with a filter but still got flagged correctly) and it's cool to have a hard data point when present. It won't help with bad/manipulative actors but a decent mitigation for the low effort slop scenario since it can survive the kind of basic editing a regular person knows how to do on their phone and typical compression when uploading/serving.