Here's how it's supposed to work: You're so desperate for your paycheck that you visit a place like the Family Financial Center in North Lauderdale to get an advance on that check, in exchange for the center itself getting to skim from that check. But if folks are going to just rob the check-cashing store, well, that takes the fun out of exploiting the working poor.Not that the thieves, who you can meet in this surveillance video are as lovable as Robin Hood. They terrorized the poor cashier, 27