So try something else that's less intrusive. Get photos/fingerprints of people who pick up, educate WU employees in how scams work and train them to warm would-be transfer originators, require them to tell customers what percentage of transactions turn out to be fraudulent and that they have had to pay millions in fines for abetting them before they take anyone's money. It's not hard to come up with other ideas.
You want to put the onus of enforcement on Nigerian Western Union operators and police?
It's not like they let the money sit around in the branch. Once it appears they send in the street rat to pick it up and run. These scams aren't just two bit crooks, they were straight up organized crime. It is an industry, one of the most productive in some areas.
