Another option might be an ISP based Filtering System. Maxnet http://www.maxnet.co.nz offers a system called netguardian to their users. It uses a combination of various systems to block various types of crud. It works with both their dialup and ADSL connections. It costs abit extra per month but works fairly well if some what aggressively. Though they quickly unblock any sites that get caught by the system accidentally and it is upto date. It blocks A variety of stuff including Porn, Criminal (Hacking, Bomb making, Warez etc ), R18, Open Proxy's, Freehosts and other stuff. They've a profile system which allows you to disable the blocking of certain Categories.
It works fairly well But does block some sites that it shouldn't usually virtually hosted ones. However when a sites blocked the blocking screen offers a review option which allows you to send off an email to maxnet if you think the site shouldn't be blocked and they'll Check it out and unblock it usually within a day or 2 (2's the longest wait I've ever had) if it is incorrectly blocked. They don't scan emails but often Porngraphic spam will fail to load properly as they'll have block the sites the email gets it images from. Chad
