...lots of good stuff...
EvilDave, you can't pretend any longer. You're a saint.
I love the idea, especially sustaining it through forging. This could also be a very easy way for people who want to give back some of what they've gained to donate to some very good causes. A minimum balance and a time interval could be defined, and periodically all Nxt in the account that exceeds the minimum balance can be spent on these worthy causes.
I think one of the genuine aims of cryptocurrency is to make the world a better place, and this just fits very well.
On a less altruistic note, this would also generate some very good PR for Nxt.