I enjoy that video as much as the next person. But I wonder if what we're seeing here isn't that the foam in the seat has deteriorated and by whacking it like that they are basically sifting up through the fabric.
I use the bus all the time. There are times where everyone on board is so jaded I think to myself how easy it would be to jerk off and get away with it
I REALLY hope that it was someone paid $20 and they designed it in 10 minutes. The truth is that it probably cost tens of thousands of dollars and went through 3 committees before it was approved.
Where I live, it's not just buses. We put the same shit on carpet and upholstery in a lot of public buildings. We just like tacky fabric that way, I guess.