IMHO it is a nice practice on a piece of paper but in reality it would be troublesome for the following factors:
1. the most common drug testing is by urine sample
- My nursing students should know that this procedure is a bit trouble some as a person who uses prescription drugs on a maintenance basis has the possibility of producing a FALSE positive result, any chemist can list down this drugs which may trigger false positive results but I am no chemist. When this happens, without any due process, a person can be immediately labeled as a Drug addict when in fact he is taking prescription medicines as per advice of his doctor.
3. Random Urine testing can not detect recent use of drugs, it can only detect drugs used as long as five days.
I know of a teacher, from another university, who used drugs but then again, who am I to judge. People change, habits change with the grace of God. I am afraid of a totalitarian government, one where we have no freedom; a place where we give up freedom for safety, convenience and economic standing.
This is the voice of Fate - V for Vendetta