Exposing – Search Engines like Google, Yahoo, Bing still considering Meta Keywords

We have seen lots of article stats that search engines like Google, Yahoo, Bind and many more are not considering meta keywords but it is not truth at all. It is just rumor announced by all search engine before some years ago just for removing keywords stuffing and give importance to quality content. Here I will make all points regarding Search Engines like google, yahoo and bind does use or ignore Meta Keywords ? and if use than HOW ?