My question is: If RMT is illegal in every game environment they do this in, then why are they not taken down at their source?

Why do developers have to continue to fight them on the Devs turf? Take the fight to their door sand start filing lawsuits and take down the websites. It frustrates me to see people attack the developers of a game for "not doing their job" when its the asshole spammers that really should be getting the stink eye. Its not the devs fault that other people decide to do illegal, annoying underhanded things with it. At least that's how I see it...