These directives doesn't mitigate any stability risk. They may be actually intended to pressure UA's to refresh unstable data, not continue to keep UA's from being retaining details. Just after redirecting on ActionFilterAttribute event the consequences of clearing all headers are shedding all session information and data in TempData storage. https://pr8bookmarks.com/story21085308/about-%E3%83%93%E3%83%83%E3%83%88%E3%82%B3%E3%82%A4%E3%83%B3-%E3%82%AA%E3%83%B3%E3%83%A9%E3%82%A4%E3%83%B3%E3%82%AB%E3%82%B8%E3%83%8E