Can I get one made with the "Mad Max" style? extend them out a foot each way to provide space for fake pedaling motions, then weld on a bunch of jagged bits of metal, balanced of course. Do not want to not induce unwanted resonances.. Sadly, an under-served market space. Sigh.
How much extra cost would that be?
Last time I drove a bike in Hanoi, I literally strapped a large rusted old stove to the back half of the (100cc) moto seat. Bought it at the local junk dealer for $2.00 Money well spent.. People do not want to go near it, drive near it , or even look at the ugly thing. I am sure they think "WTF is this foreigner doing driving around with this thing?" Lots of space tho.. Even the car drivers show fear. The busses are not impressed, nor the trucks. It is a work in progress.
TLDR? Add jagged metal bits! Maybe some lasers.