Child support is just that, money paid to support your kids. Anyone not paying that shows me a disregard for basic decency. 

Credit is one part of the picture. Income verification and rental history are big too. 

So, I use what I use and it's working out well. We extend kindness and mercy whenever we can and work with renters as much as we can. No evictions so far, only one renter who we should have evicted but didn't. I think our system is working out and our renters love us because we charge less than we could and maintain and repair things without delay.