I'm trying to read this financial article on Seeking Alpha and the web page, right after loading, gets redirected to some spammy "personal antivirus" site.

I can manually block web pages in each of my browsers, but I seem to remember there being a way to do it for all of them at once, and having the capability to import multiple websites to block at once (similar to how Spybot S&D does it) using my Windows hosts file?

Is there a way to block websites using the host file?