Its so funny, every time links like this gets posted I just nod and think "Poor bastards, they haven't figured it out yet?"
It's been 8 years since I did MDMA, so far no negatives as far as I can tell. Obviously, as with any strong drug/psychedelic, you will be a different person after the trip, what you take from that, is up to you. It is not for everybody, and especially if you feel you are prone to something like schizophrenia do NOT do psychedelics.