Do AIs sometimes scrape things that are illegal to possess like child pornography? If so, how is that legal?

A user on reddit.com's dev_community forum raised concerns about AI scraping illegal content, specifically child pornography. The user, who is not a tech person, questioned whether AI systems might encounter and store such illegal material on their servers. They further inquired if the owners of these servers should face prosecution for possessing such content, highlighting a perceived legal ambiguity regarding AI's data acquisition practices.