By putting something on a public-facing website, it's generally agreed that (absent a robots.txt to the contrary), you intend it to appear in web search results

By putting something on a public-facing website, it's generally agreed that (absent a robots.txt to the contrary), you intend it to appear in web search results, and you're granting a public limited semi-transferable revocable license to request, download and view your site to your visitors. That doesn't mean you grant a license to produce derivative works other than search indexes. Legally, it's different. (Germany codifies these as separate "moral rights": Urheberpersönlichkeitsrecht.)