Your wrong,, it has nothing to do with Canada Customs,, its a USlaw and it will only effect those travelling by air in january into the United States.

http://www.cbsa-asfc.gc.ca/agency/whti-ivho/what-quoi-e.html

more info available for travelling too Canada.
http://www.cbsa-asfc.gc.ca/menu-e.html

criminal inadmissibility
http://www.cic.gc.ca/english/visit/inadmissibility.html