That system is already in place.
I'll copy and paste the chart in my profile.
It's got things like what you said in it, actually.
Trade 10 points--Three day ban on negative user of your choice.
Trade 25 points--Topical guest editorial posted on site.
Trade 50 points--Funhouse mod for a day.
Trade 100 points--Create, name, and control your own forum category.
Trade 200 points--Ban a mod of your choice.
Trade 300 points--Ban an admin of your choice.
That's all I can see. Keep in mind I couldn't see anything until I earned six points, and as I gain points, features are actually unlocking. For instance, at seven points, you can't be banned without point reduction. At nine points, you can actually change the forum's filter.
Edit: With seven points, I could see the guest editorial and funhouse mod choices, and with nine I could see the rest.
2xEdit: Apparently, I've misread this thing, and the first ban is free. All the subsequent bans cost ten, though.