I don't have anything against moderate use of marijuana. When used in moderately the user can be able to control his behavior or other activities. I have observed that the prohibition of the use of marijuana always give rise to the use of other dangerous drugs that cannot be easily dictated. Law enforcement agencies can easily arrest someone smoking marijuana but it would be very difficult to identify someone that puts few hard drugs into his mouth.

Some persons have agued that the use of drugs could lead to financial crisis because of the cost of these drugs. Marijuana is relatively cheaper than most drugs which means it could hardly have negative impact on the finance of a moderate user.
Apart from the health problems associated with smoking and the abuse of marijuana, I think legalizing it might reduce dangerous drug trafficking and use.