There's no way that identifying it as an "anti pattern" is going to kill the practice of requesting credentials for other sites. For one thing, it's being done

There's no way that identifying it as an "anti pattern" is going to kill the practice of requesting credentials for other sites. For one thing, it's being done on the majority of social networking sites out there, including all of the most reputable ones, and for another thing it's something that a lot of people find very convenient. At best, it'll become like opening zips and exe files. Users will have to become aware of the potential dangers, but the practice of providing the files will remain.