Nay-sayers

http://lateral3.hubpages.com/hub/Metric-Sucks

References:

http://themetricmaven.com/?page_id=126

http://lamar.colostate.edu/~hillger/usma.html
http://blogs.plos.org/scied/2013/01/28/the-metric-system-united-states-of-america-and-scientific-literacy/
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&ved=0CEoQFjAC&url=http%3A%2F%2Fwww.nist.gov%2Fpml%2Fwmd%2Fmetric%2Fupload%2F1136a.pdf&ei=rjgtUbS_IZLS9ASwlYFI&usg=AFQjCNEgViBr-E4d4HjoWIOT3Mv4J-azpg&sig2=4Du1JWxAwHaict0owjDb7w&bvm=bv.42965579,d.eWU
http://en.wikipedia.org/wiki/United_States_customary_units