[greggyb]

Luckily there's a common sense rule to apply that an economic analysis of law makes clear.

Enforcement should occur up to the point where the marginal cost of extra enforcement is equal to the marginal cost of the activity we are seeking to deter.

I would agree with you that the particular circumstance described in the article does not warrant legal action, but your original post made no allowance for enforcement directed at anything other than purposeful and effective crime.