I have a few times but now that my hair is long I have no need for it. I've had senegalese twists all the way down to my butt and I own some 18inch clip-in extensions that I've worn a couple of times. My real hair is now the same length as my extensions that's why it's pointless to wear them now.
No one gave me crap about it but I do know that many people hate on fake hair.
I do, and frankly they're just easier to deal with. I use them so my hair can grow more and its not a big deal. Everyone knows or at least I think they should know and it doesn't bother me at all. Other then my one douchey friend, it doesn't bother me.