they could be improved though with the use of something like these...
http://www.componentforce.com/category/328/secure-nut-caps
or
http://www.securityfastenersandfixings.co.uk/Info/shear-nuts-security-nuts-16.aspx
@HatBeard started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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they could be improved though with the use of something like these...
http://www.componentforce.com/category/328/secure-nut-caps
or
http://www.securityfastenersandfixings.co.uk/Info/shear-nuts-security-nuts-16.aspx