Could you perhaps implement a feature that would let me put different fonts for different people, when overriding them?

I use a dark msn theme, because of that, I have to override my contact's fonts, because otherwise, it would look bad, with their dark fonts. The problem is, that it applies to everyone. It's a bit confusing when every single one of my contacts uses the same font.

I'd like to specify a certain font for each person. Would that be possible? It would make me quite happy.