In the same way you can add "excludes" but for sites you want to "ban" and will survive an update.
It creates a hosts.include file and copies it into the hosts file after dns.cfg and before hosts.dnld
I will not attempt to make a pkg ( I had enough trouble tar-ing the files

The tar is here <a href='http://gorillaville.dyndns.org/Host_Includes.tar' target='_blank'>http://gorillaville.dyndns.org/Host_Includes.tar</a>
You will need to manually put the files in the right places (and backup your original rc_hosts file - this is the only file changed - the rest go in Addons/Hosts).
PS. This may or may not work as advertised, I just made it work on my system and there is NO WARRANTY, express or implied
