I know we are venturing off topic, but I also have been shut down when reporting push accounts. They said something along the lines on not finding evidence.
In my case, there were three accounts. All had the same, short, three letter unisex name in them. All used the same portrait. They took 1st and 2nd on every single GB in all three cities. I can see where you *technically* can't prove anything with the information. But I also pointed out that all three accounts had the exact message (profile text?) in all three world. Copied and pasted- every character matched. But, apparently, that is still not enough evidence.
Since it seems impossible for an account to be shut down, I almost wish I had more time on my hands.... (kidding, but it does sent that message!)