Does Bungie ever ban win-traders? I feel like I already know the answer to my own question, but I'm hoping someone has seen them actually do it. I also anticipate a few "why-do-you-care"-type responses. To that, I say that in addition to actually wanting a competitive environment in the Comp playlist, it's also BS that people just cheat their way to pinnacle weapons when I (and others) earn them the legitimate, honest way.
It’s funny they punish people who glitched to get bad juju but they don’t do anything about the people who downright manipulate the game for not forgotten a gun some people have spent several hundred comp games trying to get.
They usually just get restricted from Crucible/Gambit and all associated gear. Keep an eye on the Help subforum and you'll see it sooner or later.