I personally don't like the "cop" theme (I don't want to be seen as a cop hehe). I also think we can come up with something more unique than check marks or badges or stars (no offense intended).
Fedora, white hat, top hat is pretty good. But I think something that other forums don't have would be cooler!
Maybe the mushroom cloud could be black for 300, half red for 1k and full red for 5k!
Yeah, the cop theme is so so. Although, I wouldn't mind it too much. I'm not sure what other forums use, because believe it or not this is one of the only forums that I used regularly. I guess the fedora hat would be a popular one.
I do like the mushroom cloud idea though. Even, if its just a colored version at 5k reports.