I have noticed that DuckDuckGo (uses Bing behind the scenes although this particular issue seems to be specific to DDG) is promoting pornography, incest, rape when you search innocuous subjects like video game, toys, and look for stuff which has nothing to do with porn or sex.

It will return only 40-50 results in some cases and 3-5 of them are porn when set to strict search results (which is supposed to hide the porn - and this isn't exactly subtle...).

Quote from listing for web search for "video game forums" - 18th result ie- second page of links:

"3D VR animation hentai video game Virt a Mate anime cartoon. Collection of giantes... 5:31. 97% Family cartoon gay porn cartoon 2:04. 86% Cartoon Gay Cartoon the Gardener 1:21. 100% Cartoon gay 11:13. 100% gay cartoon 4:20. 100% the best cartoon ever 7:31 ..."

This same thing happens on others when you use them, but DDG is really blatant lately, and google image search is especially egregious for this as well. Youtube as well (elsagate anyone??).