> They just don't make illicit drugs like they use to... They could definately kill u always, but now the potency of a microgram difference can and that's pretty scary.

Actually, this has kind of always been true. http://everything2.com/title/Heroin%252C+MPTP%252C+and+the+k...

The problem is that an illegal drug has no quality control. If you want to stop this kind of stuff, legalizing it is one of the few (possibly only) useful solutions.