Well the vehicles in the video were being sprayed enough by back-splash that they turned on windscreen wipers.
Though actually, the specific user-case for this makes it fine. If anyone’s making that same mistake and getting the seawater-stop-sign-o-doom regularly enough for that to make a difference, well, they have other problems to contend with first.
(Third thought: what about the legitimately sized vehicles driving past from the other direction?)
