Didn't know there was one but contact theymos or BadBear as they're likely the only ones that can increase it.
Actually now that I remember a bit, I think it was you "decreasing" or doing something like "vouching for reports", for a newbie who was complaining about the report limit being too high.
We can white-list users but it's only really for shortening the time between posts/reports etc for newbs or whatever. Think it takes down your limit to 180 seconds or something so probably wont do anything for you.