If you have safe search on, all the results should be non nude, non adult.
I reread the article, and see where I went wrong. They mix up two issues: bing returning odd suggestions with safe search on, and bing returning results for searches for illegal material with safe search off.
I had thought they were only talking about safe search being on.
In my misreading, I made the assumption that Bing would never return illegal results for searches for children, as it would never return pornography since safe search is on. Apologies to the OP.
