Can u please explain this

[Bart]

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Running a form with managed code business logic from a IE Trusted Site will
cause the business logic to fail with a security exception. Why? .NET
Security grants IE Trusted Sites the Internet Permission Set by default.
InfoPath forms with managed code business logic won't even open in the
Internet Zone.
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i found this in the site
http://weblogs.asp.net/davfries/archive/2004/07/08/178011.aspx

what i really dont understand is the Trusted site part.....
its in contradiction with what i know ..trusted sites have access to
everything....

thanks in advance
bart