http://www.stuff.co.nz/technology/digital-living/4608397/Google-accuses-Microsoft-of-stealing
Google is accusing Microsoft of cheating as the two duel for internet search supremacy, but Microsoft denies the charge, saying it's just using all the tools available to lessen its rival's dominance.
And so, Google laid a trap. The company made a list of gibberish or obscure search terms and manually linked them to unrelated websites. Then, 20 Google engineers took home laptops loaded with Internet Explorer, searched Google.com for those terms and clicked on the artificial results. Soon after, searching for the same odd terms on Bing would call up the same odd results.
Cutts likened the trap to a mapmaker drawing a fake street or the Yellow Pages adding a fake name to its directory to flush out copycats.