Editing Caltrop (section)

===Labour disputes===
Caltrops have been used at times during [[labour strike]]s and other disputes. Such devices were used by some to destroy the tires of management and replacement workers.

Caltrops, referred to as "jack rocks" in news articles, were used during the [[Caterpillar Inc.|Caterpillar]] strike in 1995, puncturing tires on vehicles crossing the picket line in [[Peoria, Illinois]]. Because of their small size and the difficulty proving their source, both the company and the [[United Auto Workers]] blamed each other. Collateral damage included a school bus and a walking mail carrier.<ref>{{Cite news |url=http://www.nwitimes.com/uncategorized/spiky-jack-rocks-newest-weapon-in-cat-strike/article_497e117d-f0ae-5829-8ac8-0846bb8e136e.html |title=Spiky 'jack rocks' newest weapon in CAT strike |agency=Associated Press |newspaper=The New York Times|access-date=2017-01-11}}</ref> In [[Illinois]], the [[state legislature]] passed a law making the possession of such devices a [[misdemeanor]].<ref>{{ILCS|720|5|21-1.4 |title=Jackrocks violation |accessdate=21 October 2007}}{{Dead link|date=February 2024}}</ref>