Here's my thoughts:
I'm all for discussing the merits to which something is appropriate and culturally insensitive. I think plenty of costumes are inappropriate and insensitive to people's genuine struggles and history.
That being said, I don't particularly care for the moral arbiters of the internet who get to decide what is and isn't acceptable in our culture. And if they see something they think doesn't fit their world view, then they feel compelled to try to make something go viral in an attempt to draw outrage from people on the internet.
I don't particularly care for this author who feels to be the moral arbiter of establishing what's okay and not okay to wear. The tone of the article bothers me.
Link
For clarity, I think most of those costumes are stupid and I wouldn't wear them myself.
I don't particularly think the Kim Jong Il is a major offender. And I think the illegal alien costume isn't as bad as blackface. But I suppose I'm not one to judge there. And I didn't think a pimp costume was a bad thing unless it was a kid dressed like that. I don't think dressing as a pimp means you don't respect women. I think they've got a fun iconic style, even if they are bad people.
Basically a quiz calling people's assholes and demanding people to take off their costume. At that point, articles like this begin to make me roll my eyes. I'm perfectly willing to listen to legitimate gripes about the lack of sensitivity in certain costumes. But at the same time, I don't particularly care for people who feel compelled to tell others what they can and can't wear.