I think that I'm going to add some badges for people who report a bunch of posts. Maybe one for 300 good reports, one of 1000, and one for 5000.
BTW, could you post a list of "top reporters" and their report count?
Preferrably along with reports per year or something.
I believe rank levels should reflect past experiences.
In the end, all top reporters of today should receive top rank right from the start.
Top rank should at the same time be realistically achievable within two years or so.
300 is certainly a good starting point, but I somehow doubt that 1000 and 5000 are wise.
I guess that someone dedicated enough could easily make a few hundred per day.
Maybe even some algorithm like activity would be appropriate.