Also, from the science side (if you are to give credence to their flawed thesis), with the Earth's water cycle essentially being a closed system, "rising sea levels" are essentially just redistributing the weight of a fixed amount of water over around 0.0001% of the Earth's surface (essentially the continental/marine interface). If that change has some probability of releasing some fault pressure to cause an earthquake, it has an equal probability to stabilize fault pressure and prevent a quake. And again, only over the continental/marine interface.