I don't think they are haram (in that I am not qualified to make that kind of fatwa) but could be, since rasoolulah cursed women who had camel humps on their heads. I have read the ahadith and find that I personally (while certainly not a Shiekh) believe they are makruh---strongly disliked and could be haraam. Some say the hadith says to the side of the head. I have read the original Arabic and am good with directions and it says on top of the head [as the majority of the Ulema agrees).... soooo... I mean I used to wear them before I started taking my hijab away from culture and style ect, and getting at its core before injecting my personal style back into it, but I live in the Gulf and have interviewed men, both good and bad muslims about the clips. None actually like the shambasa/Gamboo3a itself, as it contorts the head, but all of them mentioned that they found or thought of the girls who wore them as being somewhat, er, sexier or easier, or less Islamic in general. Which I mean, is bogus, but in Islam we aren't supposed to purposely appear contrary to Islam or do anything that associates us with something haraam ect. I mean, we don't sit and eat with those who are drinking alcohol in Islam, because then we are associated with the sin of doing so. If committing taburruj (attracting attention [and Gulf men have told me they attract their attention regardless whether or not they find the clip itself attractive]) is haram, then associating one's self with an act largely regarded as tabarruj even by the majority of the male population (from my non Muslim father from the West to Gulf guys of all walks of Islamic adherence), is a similar act to sit drinking soda with a bunch of people sucking back booze. *I know I could say, if I don't wear it in UAE I'll be the odd one out and that will attract attention to, but same goes for wearing abaya/jilbab in the West. I have to remind myself, did I convert to Islam, or a culture?*
I stopped wearing them now alhamdulilah, and wish I had resisted that trend when I was in Emirates, but peer pressure you could say lol, got to me, and I tried it. Whether you wear it cone on top, or above the earline to the back, both have a "hump" effect that is purposeful. If your hair is just like that it isn't on purpose ect, but the intention of getting a hump was not favourable to Rasoolulah so it isn't to me;). I mean, I see so many women who suit that hadith, saying they have hump like camels and they are dressed but naked. i.e their abaya is flung open to revealing clothes or skin tight in the first place and the camel hump hijab is there, and this hijab style leads others astray because it is close to jilbab and khimar, but it isn't, and takes people farther away from the true hijab of the sunnah very easily if you are not careful. Do any hadith talk about women from the Sahaba (who even had long hair) having bumps of any kind on their heads?. I mean, abayaat have to be loose, the hijab has to cover the chest and all the hair (and you need a super long hijab to accomplish that WITH Gamboo3a) believe me. I never see girls do it right without gashwa or something over their gamboo3a. Everyone says the intention is good, but why then do I see so few examples of modest makeup, modest loose fitting abaya, and khimar that covers all the neck, chest, hair and body when worn with this style? I know some sisters do it well but they are THE VERY SMALL MINORITY (I have seen only 2 sisters in real life out of thousands wearing Gamboo3a), but the origin of the style was not Islamic or even having hijab in mind, and that is why I personally reject it and urge other sisters to do so as well. I don't want to associate myself with something that did not actually have a good intention at the core of its initial influence.
Anyways, that's just my take on it. My reasons. I am probably going to get sistas calling me extreme and what not but then, I don't care. I wish I hadn't worn the Gamboo3a ever, and so I am just sharing that in case it is useful to ya'll in anyway:)