> But my point is that it's not a system that we should copy for preventing the use of content in training AI
The purpose OP is suggesting in the submission is the opposite, help AI crawlers to understand what the page/website is about without actually having to infer the purpose from the content itself.
>>Xelyne+74
If only there was an HTML tag that let you provide a concise description of the page content. Perhaps something like <meta name="description" content="This is an example of a meta description. This will often show up in search results.">