Hi Dan,
Why you should take down SiteAdvisor, for the same reason they would advize against scandoo.com. You know what the background is, they want to feed you all this crap unhindered and unnoticed, and it is all about loads of money. It is not the extensions, it is the users and the web site owners that making the Internet insecure, and the adsellers, and the profilers, and the spyware authors and the ugly spammers that they tug.
polonus