SE has taken a lot of steps to combat RMT, It is important you take the time to report Gil sellers, They are being permanently banned and chat filters are being implemented to stop them from being able to communicate. The system is much like google spam, it gets smarter and smarter as its updated. eventually we wont see RMT so much, so please do what you can and report. GM's are looking into the issue. They are not just sitting. It just takes time, there are a lot of them.