Most "real world" jobs require you to submit to random urine tests.
That being said, I've been working in the "real world" for over 10
years now (4 in education) and have never been asked to submit a
sample. The real question you should ask yourself is what kind of
example are you setting for children if you're worried about the
outcome of the test?
And on my other soapbox why is it that I have to be subject to a
random urine test in order to have a job, pay taxes, social security,
etc., yet welfare receipients are not required to take one in order
to receive assistance? Think of the how much the state could save
(and re-invest in education) if this were the case!