There is no uber elite hacker team, but there is a small team of script kiddies that send keyloggers to people on fansite forums and make fake websites. They aren't highly skilled at all, there was a fake rs website a few months ago that was so badly written a view at the source, some other stuff and a few google searches gave me the guy behind it's address, phone number, full name, rsn and e-mail address. It is impossible to hack into jagex's databases to steal accounts, anyone who says they were hacked gave out their account details one way or another whether it be installing a keylogger, telling a friend account details or entering their details on a fake website.