Happy to echo that sentiment Murphy.
Using any service to wire money, not just WU, to anyone that you are not 100% comfortable and confident with is a recipe for absolute disaster, and should be avoided as a payment option at all costs!
Keep yourself as safe as possible from loosing your cash by choosing better options like Credit Card and PayPal. If a supplier doesn't want to offer you a safe payment method, then you need to ask yourself if it's worth the risk doing business with them.