There are two specific types who tend to be the worst affected here.
You mention the first - work users. This is normally because the users need Internet Explorer (sometimes even a specific version) to be able to do certain things, from programs and interfaces to portals, as well as where the admins use certain policy restrictions to control work usage which other browsers do not acknowledge.
The second group is the home user group that do not have the technical savvy to use anything other than what is supplied fresh out of the box. it's hardly a small group and it's one of those groups that tend to be the biggest source of worry because these are the folk that may be using an unprotected system as an administrator using the Internet, opening and following spam and clicking on anything that looks even remotely official.
You may guess from both these examples that I don't necessarily hold Microsoft directly responsible for what goes on here...
Biting the hand that feeds IT
