I don't agree with that. MDMA was developed for medical use. Mephadrone is made in some dodgy factory in china.mdvp (methylendioxypyrovalerone) and mephedrone (4-methylemethcatinone)
the stuff dont sound too dangerous to me, id say oxy, H, mdma are more dangerous than this shit
Also MDMA isn't dangerous lol. I don't do it anymore but i used to have a 1/8 mdma cocktailed with Ket, weed and drink.