I think so too. But if you really think about it. This just cant be helped. People would almost always find away to get things their way. Even if that would mean going through the illegal stuff.
True but tagging them would at least make it more difficult to them and/or slow their illegal business and/or at least push their business to another site, protecting somehow bitcoin's reputation.
Sadly I think this is a moot point as some are obviously ok with buying carded CG... which is honestly sad. It should catch up with them eventually companies do track addresses of where carded items were sent to.
I don't think it's a moot point. If most non-GC-seller trusted users agree it should be stopped then we can reach an agreement and try to stop them. Of course not everyone will agree.