Well, it's a rope around the neck, and any rope around the neck is dangerous enough for me xD Actually, I haven't found a single picture with the actual knot. Weirdness.
And I found the prettiest wig ever! They've only got three, I should buy it, like, soon @_@
(Just read chapter 108. Sharrkan is so coool~)
And I found this blog with Magi cosplays. Jaw-dropping! http://fuckyeahmagicosplay.tumblr.com/