[dspeyer]

That's the theory. Enforcement makes things harder.

At least in the US, (and I strongly suspect in Canada as well) it's up to a jury to decide if the given rationale is genuine or an excuse to cover bigotry. Anyone who knows anything about how to do the job is likely to get blocked at jury-selection. Imagine explaining to 12 literature majors why cubic-time lookup is bad, while opposing council wants to know how often you use key-value stores in your day-to-day work.