Viewing and Modifying the contents of another partition could be looked at as a pretty risky process if you have mission critical or confidential data. I mean potentially if you created a user account that could log on under fedora and read and write to your NTFS volume, your NTFS volume could be compromised. that is why i believe that the NTFS modules are currently only available with read support and write support is still experimental (until kernel 2.6 officially comes out) for just root.
I'd imagine there is a way to change the permissions of a user in the file /etc/shadow, but really administrative stuff should really be done as root. i mean sure it's a couple extra steps, to change the permissions on files, but really, it's not THAT bad is it? i mean other than document files what good is a windows partition anyway?
you can do everything in linux you can do in windows. and more. however, if your a windows gamer you have to install wineX to play your games and that can cost you money (morally at least that is).