It's funny, but it actually doesn't look very risky to me. Guaranteed the cables below ground are water proof, so this would be about as risky as charging in the rain (which means not at all). The pumps don't turn power on until the cord is fully inserted and it communicates with the car to identify supported charging rates, then it measures the line resistance to identify losses that would lead to an overheat, then it continuously tracks ground faults. Any short would be immediately identified (before power is even applied). Think GFCI on steroids.