One of my coworkers was born in Nigeria.
He was drafting up a taxi-cab control law last night. Apparently they have a problem with dirty drivers robbing and killing passengers.
He had only written a page when I saw his plan, but it was intricate enough that it would have vcost some big money. He proposed four levels of taxi driver control agencies, and a network of setellite phones in every car. Police could stop any cab at any time for any reason or no reason to administer breathalyzer tests. Failure would mean loss of license and jailtime.
His plan was that he would get Britain or the U.S. to pay for the satellite.
I told him that they have a bigger problem than just a couple of dirty cab drivers. It was obvious his goal was prevention. Prevention doesn't work when people are sufficiently motivated to break the law.
I recommended to him: Draft a simple law, and enforce it vigorously.