yes the wrong one argument, the problem with that is, for every innocent person who is killed by accident, many more have died because of the criminal(s). That's the ultimate flaw with the "wrong one" argument.
It assumes that 1 innocent person is worth all the innocents who are the victim of crime because there is no deterrent whatsoever, and nothing to stop reoffending.
And a way around this is to say "life means life" for all 1st degree murder and drug dealing.
Ohhh but no.. course not. We cant do that either can we? The poor criminals need their playstations and TV. I take great comfort in knowing that this liberal experiment which has doomed my country will one day come to a sad end. The death penalty will return and when it does, we are never goin' back again.
edit:
If you come up with a rational arguement for outlawing Marijuana, you almost have to concede that Alcohol and Tobacco must also be outlawed -
Tobacco should be outlawed yes. Alcohol on other hand, in moderation, is not at all detrimental in comparison. Tobacco is always detrimental and affects other people directly. The only people who should be banned from Alcohol are the louts who can't handle it and have to binge drink 24/7.
There is a great power of socialising and a good time with alcohol if it is responsible. I can't use that argument with Cannabis and Tobacco, since both are detrimental to health, even in small quantities. Tobacco is also physically addictive.