Subprime market tightening...

Interesting story from the Times here regarding various failures of subprime mortgage providers. An interesting side note to the housing slowdown story.

How good are we as real estate professionals (in whatever role...lawyer, agent, broker, mortgage broker) in essentially telling a potential client, no, you either can't afford this home or these mortgage terms are a bad deal and you shouldn't do it? I know I generally take a passive role in the mortage process, mainly just pushing a Buyer to get approved in a timely fashion and watching the contingency date. Perhaps I'm the one (lawyer usually) who needs to just say no? I have no financial interest in closing.