Lots of interesting things happening in Ontario on this subject.

The Ontario Court of Appeal recently ruled that employers may not test their employees for marijuana, as it is a violation of their human rights. They are only allowed to test for impairment while on the job.
Yes, I said marijuana because of the subject of the node, but the ruling was for all drugs.

I've never been bothered about it either. All that legalization would do for me is making it available from 7-11 or whatnot.