I have another possability to add to Simon's words of caution with the htaccess redirect:
What if the surfer is so NOT tech-savvy that they're unable to remove the tool themselves?
It's a great list of instructions you have there Jim, and you've executed things very well, but seriously... to the average surfer this might read as geek jargon.
If there was an instant correction tool that could handle all the steps with a single click, then I could see forcing the surfers to comply as a viable option. However, because we'd be forcing them to do surgery on their own systems, something not all can do, I think it would piss off a potential customer.
That being said, I do think it's a great idea to link to your splash page if my page detects the toolbar. This way we're giving the surfer the option to comply with a personalized message without using a popup - which, as Simon pointed out, would probably just be ignored anyway.
I imagine creating a really big, annoying, full-page warning statement is a great incentive to comply.
I'll be sure to add in a link to your page on as many of my pages as is feasible, and I'll give you a list of all the domains I add it to.