I’ve seen some pretty good host files in the past, but this one looks like the most thorough. Not sure where the name comes from though. “. . . so quite simply this file tells your computer to try to access itself whenever a banner advert is requested from a server that is in its ‘black’ list, so instead of contacting the advert server your computer simply tries to request itself and as your machine doesn’t contain any adverts (if you are not running a web server on it) nothing will be shown.”