Disable Viewing of Font Color/Size Changes for Certain Usergroups?

[Semjaza]

Perhaps this exists already. I've tried searching, but had no real luck.

Essentially, my forum allows people to use any color and font size choice they wish. I'd like to keep it that way.

However, I have a handful of people who are complaining about certain colors and font sizes. I was wondering if there was any way to make a usergroup that simply would see all text as black and a normal font size, regardless of the choices made by the original poster. This would allow every one else to post as they please, but also make the handful of people who have a hard time with it happy.

I didn't see this option in vB itself, so I figure a plug-in would be able to manage it. If anyone can help me out or point me in the right direction I'd appreciate it.