I just learned about "hostile design" today (via BBC Trending), and I'm finding it really fascinating. On the one hand, you have design features that could be useful to some groups but harmful to others: for example, railing on benches can provide support for the elderly (or just make for relaxing armrests for anyone reclining upright) but prevent homeless people from sleeping on the benches. And then you have other features that seem designed only to prevent people from using the item in an "undesirable" fashion, like benches with awkwardly placed bars that clearly aren't intended to provide support or comfort to anyone and therefore definitely discourage horizontal repose. Hostiledesign.org has a number of photos of especially egregious examples of the latter; apparently NYC designers love putting spikes on surfaces to keep people from lying or even sitting on them. It's terrible, and yet I can't help being impressed by the diabolical ingenuity and audacity of some of these approaches. SPIKES. Victor von Doom approves.