Yeah! That's one of my favorite things to talk about when mentioning A.I.!
Scraping images from the Internet is pretty bad, especially if you get more A.I. generated images than "real" ones, because A.I. always makes tiny mistakes. If it learns from an image made from an artist, it'll incorporate characteristics from that artist, but with a tiny amount of "mistakes", in order to make it sort of unique. However, if it learns from an image made from another A.I. (or itself even), it'll not only incorporate the mistakes that the first A.I. made, but also add mistakes of its own.