But I *still* don't see how this relates to the danger of dropping an
electrical appliance in the sink. Unless you keep hold of it as it
drops in the water, and even then it doesn't seem to be a particularly
dangerous thing to do.

People should stop worrying about it. Just install an RCD and there won't be
a problem. It's unlikely to be a problem anyway. A quick jolt followed by
"duh, that was a stupid thing to do".

Christian.