I can’t believe that I actually agree with TheBreeze about anything!
This is what bothers me about your rationalization, and everyone else’s who is in your situation – YOU made a bad financial decision and if you walk away, you are asking ME to pay for that bad decision. That makes me very angry.
You (and everyone else walks away) make the argument that you need to think about what is best for your family. What you don’t say is “I am going to do what is best for my family and I don’t care if it screws your family”. But whether you realize it or not, that is exactly what you are saying.