What is the message of the film "A Scanner Darkly"?!

Question: What is the message of the film "A Scanner Darkly"!?
Answers:

Drugs cause paranoia, and worse!. Government surveillance brings about the erosion of individual privacy!.Www@Enter-QA@Com

Im not sure it had a message, if it did, maybe:
"dont do drugs" or
"dont risk yourself for your job"!.
:)Www@Enter-QA@Com

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