My fruits of communicating with Photoshop.
While creating this I tried to examine what we (I mean the reporters) are actually here for and what we do. Here're some thoughts (and their graphic embodiments).
1. We are here to prevent, hold back and observe.(but not to punish; that's why I don't think that stuff like nuke mushrooms or ninja shurikens would fit it; though things like flowers and clover would be too soft)

The eye on the hand. This has two versions: simple and "evolution" one.
Evolution is more interesting in my opinion: it not only changes the color, but also gradually "opens" the eye.
I thought that blue would be better for the second stage.
The "evolution" sequence:

for 300 good reports;

for 1000 good reports;

for 5000 good reports.
The simple sequence:

for 300 good reports;

for 1000 good reports;

for 5000 good reports.
2. We keep a hand on the pulse of the community.
The pulse line in the Bitcoin background. The sequence:

for 300 good reports;

for 1000 good reports;

for 5000 good reports.
Also I drew these guys (imagining reporters invisible like ghosts or something similar).

They're two though. I made the blue one also (for the second stage most likely), but didn't complete it. In fact it's not obvious that these are ghosts when they're small. The sequence is following currently:

for 300-1000 reports;

for 5000 reports.