Useless is as useless does
You asked about useless car accessories… Utterly useless was the rubber strap hanging of f t he rear bumper, for purpose of arresting child carsick ness. Supposedly wit h a metallic strip in t he rubber which directed t he stat ic elect ricit y to t he road. Problem was that the strap never made contact wit h t he road unless t he vehicle stopped.
Albion Park, NSW