Hence why I put hacking in quotes...? I'm just pointing out that Dropbox is arguably jumping through hoops to get access to functionality that Windows gives to basically anything that gets a toehold on your system.
It's a basic fact of the way Windows is designed. If you can get code to run on a Windows computer, you get a lot of power over that computer. Even more if the user is a local administrator. As someone that tests Windows computer network security on a regular basis, it is rather disturbing how much work you have to put into making a Windows network actually secure.