I just read your recent bk-MBDB trip report on erowid, and to be honest it sounded rather lovely, actually!
I wouldn't be too concerned about bk-MBDB harming future generations of drug users. I wouldn't think it would be much more or less toxic than MDA, MDMA, MDE, MDC, methylone, ethylone, MBDB, BDB, amphetamine, methamphetamine, ethamphetamine, cathinone, methcathinone, or ethcathinone. These drugs have been used for years and have proven themselves to be quite safe as a whole.
In fact, the only PEAs/AMPs that I consider to be particularly dangerous at this point are pMA, pCA, fenfluramine, and 2ct7. Also, I try to avoid all DOx's, except for maybe DOET; in fact, I haven't done any DOx thus far, and that's perfectly fine with me. You see, I have some friends who had a long, sickening experience with DOC blotter which I watched first hand.
As for the four PEAs/AMPs that I listed above and which I consider to be dangerous at this point, half of them were available by prescription in the US for years before being pulled from the market. Fenfluramine caused heart valve defects, and I'm still not exactly what p-chloroamphetamine did wrong--that is, whether it was banned due to practical or theoretical considerations, though I suspect the latter.
To be quite honest, the reason for this gaping hole in my knowledge is that I have never been able yet to locate and talk to a 1970s drug user with any experience with pCA at all. I know a meta-aromatic chlorine seems to cause no problems for bupropion/Wellbutrin/Zyban, a popular prescription cathinone. It is possible that pCA was pulled from the market, whether openly or furtively, due to abuse potential concerns under the aegis of neurotoxicity; again, I really don't know.
I'd like to hear from someone who has tried
3,4-dichloromethamphetamine even more than that, though. From what I understand, aromatic chlorines are remarkably non-toxic. Solo
para-substituted amphetamines, on the other hand, are not always so forgiving.