Type "White people ruin," as a potential advertising keyword into Google's ad platform, and Google will suggest you run ads next to searches including "black people ruin neighborhoods."
Following our inquiry, Google disabled every keyword in this ad campaign save one — an exact match for "blacks destroy everything," is still eligible.
https://www.buzzfeed.com/alexkantrow...Qqd#.bsByjK0DG

Twitter Lets You Target Ads to Millions of People Who Use the N-Word
http://www.thedailybeast.com/twitter...ike-the-n-word