I'd have a lot more sympathy for them if they hadn't repeatedly lied, pointed the finger at innocent people and obstructed the investigation. Regardless of their reasons, they never put Caylee first and IMO, that is them being purely selfish.
In fact, Cindy is still lying to this day. I have no interest in listening to her further trying to rationalize her "loving" daughter bagging up her granddaughter and tossing her in the woods, especially when she can't keep her facts straight and flat out lies to make Casey look better. She's as divorced from the truth as Casey and it's tired and pathetic.
IMO, they need to muster up some dignity and go away. The networks need to stop giving them money that they probably won't pay their rent with anyway. From what I've read over the last couple of years, their house is constantly in foreclosure.
You seem like a very nice person though.