I've been seeing quite a few topics and in-game chat suggesting that many people have been hacked. I don't know much about what process the hacker(s) could have used but this thread's purpose is to give a few suggestions on how to expose or possibly even catch the hackers. Feel free to share your ideas.
1: IP addresses - Everyone on the internet has one, and if robby can track a players ip address then this could end up being an easy way to find him/her (also credit to blob for this). The main problem with this is that it isn't that difficult to use proxies to change or mask an ip, so..... yeah.
2. History - im not sure robby can look into a player's trade history or not. If he can then it should be pretty simple to find out the hacker account from there. Everyone's items and money went somewhere without the players' consent.
That's all i got for now. I hope this is resolved as soon as possible.