http://www.cbc.ca/canada/story/2010/07/15/supreme-court-internet015.html

Our Supreme Court has decided  persons engaging in sexual chat on the internet must make a reasonable effort to ascertain the age of persons they converse with. In the case in point the person – who turned out to be an undercover police officer – was in an adult chat room but stated to the accused that he was only thirteen. The accused’s claim that he believed the person was eighteen because his profile stated so and because he typed efficiently were held not to constitute a reasonable effort to ascertain his true age but rather an excuse not to make  such an effort.