In the case that a phone got bricked, can the store owner just shrug it off? If malware was injected, who is to blame? When something suddenly breaks because conflicting apps, is that the customers fault? Does it matter if the app was sold 14 days ago, 30 days ago, 1 year?
It would make for a nice reading for a solution to this problem that would handle all of this, while retaining fully compatibility with consumer laws and customers trust in the market.