Interesting thought.... but if someone does not want to pay you back and knows the loan is secured, they will likely not pay the bank back...
True. But if you loan them money and don't get paid other than losing your trust there are no negative results. Do that to a bank and see what happens to your credit report.
And why would they spend their time trying to get payment when they have a chunk of cash they can take the payment anytime they want...
This is there area where I can't provide an opinion based on actual knowledge. My uninformed opinion on this scenario is that the funds securing the loan could most likely not be accessed unless the loan is foreclosed on, like any other secured debt. If other posters on the board have actual knowledge of banking policy and procedure they might be able to let us know if this is even possible.