tl;dr: Anthropic is rolling out text watermarking on all Claude models globally to comply with the EU AI Act, using a SynthID-style technique that biases token selection toward "green-listed" words detectable only with Anthropic's secret key. The author argues this deliberately degrades word choice—the essence of writing—for a scheme that harms honest users (who risk false accusations when using Claude for proofreading) while being trivially defeated by bad actors via paraphrasing tools. He contends Anthropic's claims of "imperceptible" quality impact are unfalsifiable marketing, and that applying an EU regulation worldwide reflects either technical incompetence or corporate cowardice.