Web scraping is the programmatic retrieval and copying of content from web pages. It lets people gather text and images for datasets used to train and test artificial intelligence models. section 4.12
Publicly available content has often been treated as legally scrapeable, but licenses still govern code and data. Website owners can publish robots.txt instructions, although malicious programs may ignore them. section 4.12
Data sources and stale recommendations
ImageNet was assembled from internet images and human labels. Search-engine bots scrape indexed websites, while Reddit, Twitter, and Stack Overflow have negotiated data-access deals. A later AI recommendation to put glue on pizza reportedly traced back to an 11-year-old Reddit comment, illustrating the risks of scraped, outdated sources. section 4.12
