Drugs shouldn't be legal because nothing good comes drugs. Some drugs are addictive and and you would keep on wanting them. If you do to many you will overdose and after a while die from it. Also they can cause some serious health problems and consumed daily can kill you.
People who do drugs have a right to treat there bodies the way they want as long as they are not hurting anybody else. If drugs are legal when people are being affected by drugs they will be able to call for help without worrying about being arrested.
If you legalize drugs there would still be violence especially if you not your self for taking a lot of them. If they do legalize drugs there would still be illegal drug dealing and violence will still go around for illegal drug dealing.