You can increase your site's rankings by installing the Bing Toolbar amongst a group of people and have said group search google for your target keyword and click through on your result.
But you can just skip the toolbar altogether. Just go to Bing and do the search and click your site. Likewise, if you go to Google and do the same, you'll increase your ranking on Google. There is nothing new here, except if you install the toolbar and go to Google you can increase it on Bing also.
This is something people have been doing for a while.
Google is able and willing to manually screw around with search results in a seemingly easy manner.
Google can do this even if Bing stops this current practice. Just go to Bing, do a search, go the last page and click a link.
Fundamentally, with respect to fraud, nothing has really changed.