If it was me I would sue Apple for not having a big frikin’ warning label on the phone. “This Device Must Not Be Charged While in the Bathtub or Near Any Source of Water Including Sinks, Showers, Ponds, Lakes, Rivers, Streams or anywhere else where the possibility exists that it may get wet while charging. Electrocution, burns or even DEATH may occur. Removal of this warning label is a felony.”
Reminds me of the legal warning for my car back up camera. The darn thing take 20 seconds to boot, display the legal message so that you can't sue us, and then turn the camera on. By that time, I will have already backed up out of the space and driven 50 feet down the aisle towards the exit. You could reasonably argue that the camera is useless all because someone got sued.