Society of A'holes: Anti-Homeless Spikes

http://elitedaily.com/news/world/controversial-anti-homeless-spikes-prevent-homeless-sleeping-doorways/624292/

http://www.travelandpositiveliving.com/2014/04/whats-purpose-of-concrete-spikes-under.html

http://www.ministryoftofu.com/2012/07/photos-guangzhou-sets-concrete-spikes-under-bridges-to-drive-away-homeless-people/

http://stsnext20.org/vignettes/2014/03/26/when-parisian-benches-have-politics-street-furniture-and-the-strategies-of-spatial-exclusion/

http://rue89.nouvelobs.com/photo-rue/2009/11/26/empecher-les-sdf-de-sasseoir-la-ville-ne-manque-pas-didees

http://www.morbleu.com/le-tiers-exclu-iv-des-dispositifs-architecturaux-anti-sdf/1547124430_1854ccee23_o/

http://fictioninternational.sdsu.edu/wordpress/catalog/issue-43-walls/do-not-remain/

http://www.bogoboo.com/bizarre-park-bench-spikes/