It occurs to me that whatever I think of this new 'issue', the truth is most kids today are likely to be wearing superhero garb and the like; unlikely that they'll be going out as cowboys and Indians for example (no cowboy and Indian movie or show in decades, for one thing).  It's been some years since I've been to an 'adult' Halloween event but when I used to go, the vast majority of girls and women wore something sexy if they could (witches, for example), the guys showed up as pirates and the like and sometimes, since their idea of a fun outfit might be something ridiculous, things like out houses (yes, I've seen an outhouse costume!) and peanuts.

While there's the odd person who may show up in something in bad taste, for the most part, this is it.  We're losing our sense of proportion here folks!