Bing has added a stern warning for webmasters who are using keyword stuffing techniques for manipulating rankings without being caught. The warning is present in the updated Webmaster Guidelines of Bing.
As per the warning, Bing can demote or delist the website that is using keyword stuffing. Here's what is written in the new keyword stuffing section:
"When creating content, make sure to create your content for real users and readers, not to entice search engines to rank your content better. Stuffing your content with specific keywords with the sole intent of artificially inflating the probability of ranking for specific search terms is in violation of our guidelines and can lead to demotion or even the delisting of your website from our search results".