All illegal drugs should not be legalized because the legalization of illegal drugs would increase addiction. It can impact a great number of consumers especially kids. The kids may use the drugs as normal because it is easy for purchasing. The drugs not only destructive to people.
Legalizing cannabis would send out the wrong signal to drug dealers and drug users. It would imply that drugs are safe and that the authorities are weak on drugs and drug abuse. At the very least, marijuana smoking carries many of the same physical dangers as cigarettes, with harm to others caused by second hand smoke, as well as to the smoker.