An ISIS terrorist with James Foley’s headJournalists James Foley and Steven Sotloff were captured by terrorists and later executed. No explanation should be necessary as to why this is a horrible Halloween idea.

Robin WilliamsDressing up as one of the legendary comedian’s famous characters is 100% okay. We might even give a thumbs up to a zombie “Mrs. Doubtfire.” But wrap a belt around your neck and call yourself Robin Williams, and you’ve crossed the line.

Ray Rice and wife Janay Palmer This might be the worst couples’ costume idea ever. There’s nothing funny about domestic violence. Nothing.

Adrian Peterson and his sonLet us re-iterate, domestic violence is NOT funny.

Sexy Ebola Nurse Several online retailers are selling some pretty tacky "Sexy Ebola Nurse" outfits. The only thing worse might be going as someone stricken with Ebola, like NBC cameraman Ashoka Mukpo.  

Zombie Joan Rivers The late "Fashion Police" host could take a joke, but this is borderline rude.

Trayvon Martin or Michael Brown "Grey's Anatomy" star Jesse Williams went on Twitter to denounce anyone who dresses up as Trayvon Martin or Michael Brown. "We don't reflexively celebrate random or routine white death, make memes of your bleeding corpses, etc. Tell us about this unique obsession," Williams wrote.