Even if you dropped a mains extension socket in the bath I doubt many people would die from it. Electricity always takes the path of least resistance. If you dropped a mains socket in the bath, the ground pin is what, an inch or two away? It doesnt electrify all the water, and the electrical field strength would be very low away from the socket due to the short ground path. It would be pretty unfortunate set of circumstances to die in that scenario
Not exactly, the flow of electricity is in inverse proportion to the resistance, so current flows everywhere but most of it hits ground, however this is assuming there is a ground pin in a cheap Russian power extension socket.