To backpedal just a little, I take offence at the simple conclusion, that removing lines, signs and lights will make things better. If you read a bit closer most of the experiments are a bit more nuanced, for instance "a traffic circle, an extended cycle path, and a pedestrian area". It seems that in the famous experiment Monderman actually did add a fair amount of paint to the asphalt.

Also, bad paint is worse than no paint, in particular dividing the road into more lanes than there is room for.