When can we say that a drug is legal and illegal. All drugs are harmful if not taken properly or being abused right? in this case, I think all drugs are legal, It's just a matter of how a person utilizes it right?
The only thing that makes anything legal or illegal is if Government uses some form of adjudication to make it so.
If you are property of the Government, then legal and illegal apply to you. If you are not property of the Government, then illegal and legal do not apply to you.
In the United States, if you are taken to court by Government for anything, if you require it, Government has to show the harm or damage you did. The entity on the complaint against you (the indictment) has to take the oath/affirmation, get on the stand, speak into the record the harm you did to him, and show the harm, and prove that it was you that did it to him.
Using drugs at home doesn't hurt anyone. Prove it if it does. Somebody make a claim that accuses. Government only makes complaints. Claims in law overrule complaints. Make the claim in court that nobody is going to get on the stand and show the harm you did to him. State that if he does, you will reimburse him. Government can't get on the stand. Government is only paperwork. If a man/woman gets on the stand, make sure the man or woman is the one on the indictment.