I think the idea is that behavior that seems abnormal, or a significant departure from your norm might be seen as fraud. I’m not sure what kind of fraud you’d experience in a search engine, but here we are. If I had to make a charitable guess, maybe it’s related to you possibly being logged in somewhere and a fraudster may visit those websites (like shopping websites)? I personally think it’s bullshit with a laughably weak veil of security.
By the way, I love the term, “cognitively bankrupt” lol, I’m stealing it.