^ Have to agree with Mr Z here - MDPV is potent, but doesn't seem to have anything like the crazy potential of meth for most people. If I'd used meth the way I sometimes use MDPV, I'd be getting a giggle jacket (the ones with the extra long bits that tie behind your back) for Xmas.
BTW Refluxer - if a compound is carcinogenic, all you're doing is changing the site of where it begins by changing the route of administration (except for specific carcinogen/organ linkes like benzene & bladder cancer). I like to wash/clean things regardless of route of administration. Certain drugs have cytotoxic/carcinogenic compounds present as impurities if made by a certain route (eg. 1,3-dimethyl-2-phenylaziridine in meth made using RP/I) so if you know there's the possibility of them being present, your health choices are in your hands...
Plant extracted drugs are generally far, far better in this respect.