@ Steve Roper
That's great, it would be good if more hots took the same stance, and it's great that the site owners themselves have (so far) supported you.
The only problem would be if (when?) all 3 of the currently interested providers do implement this system.
Presumably these ecommerces sites you host are geared towards to UK market (just an assumption on my part here)? If so, how many ecommerce site would be happy with their hosts blocking 70% of their potential market?
That's the only fly in the ointment I can see in it for now, but it is stil a strong stance to take. If enough sites took this stance (expecially a couple of big sites such as ebay) then customers would be leaving the said ISPs in their droves, and it would be the best way to hammer home to issue.
Have you contact the BBC, Channel 4, The Guardian and, of course, our own El Reg about them doind a story on this?
For a lot of people, just seeing a news story that parts of the web will be closed to them due to these actions would be enough.