Drug addicts, as a general rule...Irresponsible, untrustworthy, and very poor at making rational decisions. I don't think we need to remove them from society, but definatelly restrict their behaviors while in society.
Blacks, as a general rule... Killers, rapists... hey wait a minute, isn't this called stereotyping?

A) Systemic drug addiction.
B) Violent drug addiction.
C) Violent crime as a mechanism to get more money for drugs.
D) Increase in home violence and drug-induced psychosis.
E) Significant increase in prisons being built to accomodate those that obviously shouldn't be on the streets.
These are all based on the assumption that with drug legalization comes more addicts. As far as I know, there has been research to both support and disprove this, which pretty much makes either side an assumption. Although I don't think the government has the right to say we can't use any drugs, I definately don't support legalization of addictive drugs simply because it's already illegal. My theory on the whole thing is that if all drugs were legalized, the first generation (and those that haven't seen the effects firsthand) would fuck up big time. After that, people would see what happens and the next generation wouldn't do as much (pretty much sums up the reason I don't drink).