It's true.. hold on lemme get sources..
Read through:
http://www.erowid.org/chemicals/mdma/mdma_neurotoxicity1.shtml#longtermchanges
Any agonism of both 5-HT and DA will likely result in neurotoxicity..
But yeah it's also kinda true in my own experience.. i used to be extremely confident, outgoing, etc.. fast forward past MDMA abuse* and i'm paranoid, riddled with anxiety and depression that i am only now startin to get over..
*But then again i have abused other chemicals (amphetamine, 4-mmc + others)..
It'd be stupid to assume MDMA causes no damage to your brain once you know a bit of info surrounding it that hasn't been published by pro-drug users / MDMA enthusiasts..