I respect the Christians who worry about the devil, but really it's quite harmless. Heck, I'd gamble most of us who even believe in ghosts & monsters don't even associate them directly w/Satan/devils. Maybe it was supposed to be a recognition of the evil that is wiped out by holiness, but now it's dumbed down to just getting a kick out of what is supposed to be scary; indeed, laughing it off as you laugh in a fun house or even on a roller coaster.
I just think little kids are wicked cute in those outfits. And I love cutting Jack-O-Lanterns with those new templates.
My wife just emailed me a picture of our (eight-month-old) grandson in his Tigger costume. Screw the Europeans and any and all other killjoys, they have no idea what they're missing.