
Might want to be careful with that suggestion. IE gets a little weird about the trusted sites zone. Setting the security slider doesn't mean exactly the same thing in different zones, which is counterintuitive. There are parts of windows that only check which ZONE the site is in, the slider position isn't checked. It just sets a bunch of things to an arbitrary set of defaults.
Ask your self, do you really think that every security function in IE has a selectable option in the GUI settings page? Or could someone at MS possibly be lazy, or stupid, or intentionally obfuscating an essential security check. I can't say that I have peeked into the gut of the latest version of IE on vista, but earlier versions have happily surrendered both local file system and windows registry access to "trusted sites" even when trusted sites was set to maximum security. Some of the ActiveX stuff gets weird about the Zones too.
Considering that in almost 15 years they couldn't be bothered to implement a security zone that allows tight control of locally saved copies of potentially unsafe content, I prefer not to make assumptions that include them having thought things through. These are the same people who keep missing the fact that it's a horrible idea to use a blacklist (i.e. the Killbit) to keep a ActiveX control from running in IE. So we get a fistful of root exploits every year because developers who will NEVER write a line of code for IE forgot to check a box in Visual Studio. Hello, Whitelist?
Since the tone of this is fairly harsh towards MS, I feel I should apply some at least the kiss of the jackboot to the pants our friends at Mozilla. Before they realized they could grand stand about security they were just as bad as MS. They both militantly believed that they could make the web browser into the it-does-everything-wonder-app. Now they lie through their teeth claiming to be more secure, while pretending that they ARE secure.
Hats off to all the the coders who have been working their tails off fixing things, but there is still plenty of ugly code and bad architecture to fix. Also while root exploits seem to be take seriously, privacy issues like invasive java script, third party cookies, web bugs, and and other session tracking techniques are generally left wide open, and only managed effectively through the use of third party tools and extensions. Probably because of generous cash contributions from data mining firms and banner ad houses?