I definitely ran into clients like this more than few times when I did freelance development. I even once had a small restaurant owner ask for $750 back (after

I definitely ran into clients like this more than few times when I did freelance development. I even once had a small restaurant owner ask for $750 back (after work had been performed) because his refrigerator broke and he needed money for repairs. The types of clients who won't pay are generally not worth working with, and it takes time/experience to spot them before signing to work with them. "Just pay me" is one of the reasons we're starting matchist (matchist.com): no more problem clients for quality developers.