Apparently it’s called ‘happy splashing’ – you drive through a puddle with the deliberate intention of splashing a pedestrian. (I suppose it makes a change from throwing stuff at cyclists.)
A spokesman for Devon and Cornwall Police said: "Deliberately splashing people by driving through a big puddle could mean that the motorist was driving without reasonable consideration for other road users.
[I love that ‘could’, as if there was room for ambiguity.]
"There is also the real danger that by driving through deep water this could cause the driver of the vehicle to lose control and could result in a road traffic collision.
"People involved in this practice could find themselves prosecuted and points put on their licence."
They could. But even if successfully prosecuted they won’t of course be banned from driving. As they should be.