Chainsaw

Fancy suburbs do not sport anything so mundane as spikes. Instead, they have automated chain blades constantly rotating and sticking out of the ground, walls, and ceiling for no reason. It is one of the modern-day interior design dead ends. It does not help that they only come in pink, making their installation an exercise in a painful colour clash. Nobody really wants them around, but much like city fountains, a place just must have them to be taken seriously.