High School competitive debate- calling someone a criminal causes them to be one. Any evidence?

Question by Kade Ward: High School competitive debate- calling someone a criminal causes them to be one. Any evidence?
In a high school competitive debate scenario, I am planning to argue that the abuse of illegal drugs ought to be treated as a public health matter, not one of criminal justice. I would like to argue that by treating the matter as a criminal issue, we essentially create an atmosphere which is conducive to crime. Rather than treating drug users as criminals, we should recognize them as having health issues, both mentally, and likely otherwise. By treating them in such a way, we as a culture encourage users to seek rehabilitation and become clean. Basically, I need a philosopher, psychologist, or other professional who has said that categorizing people as a certain thing essentially makes them into that thing which we categorize them as. Can anybody suggest any such literature which could be used to prove such?
Larry G.- Do you know of any sources for the teacher example?? That would be great if I could cite it!

Best answer:

Answer by Trooper
How about a historical example. End of the Civil War, both the North and the South had many irregular forces, and guerrilla forces. But the ones in the south were categorizes as criminals, even though their actions were the same as the norths. This was the beginning of many outlaw gangs, such as the James and Younger gang.

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