While Savić believes that unpleasant design is often inevitable, even useful in some cases, she thinks the notion that objects can solve problems is flawed. By attacking one problem with unpleasant design, other problems are often created, she says. She gives the example of pigeon spikes, which deter pigeons from landing on eaves and other structures. Though the spikes work well, they tend to concentrate birds in locations without spikes. It doesn't solve the root of the problem, it just moves it. The same could be said for anti-sleeping spikes, anti-drug use lights, and many other forms of behavior-discouraging design.