Information & Ethics committee  I believe there is a process to get off the list, but you'd have to go to Transport Canada.

Information & Ethics committee  Passenger name records.

Information & Ethics committee  This is not necessarily directly related, but the United States has a right to determine who is admissible to their country, and not having a criminal record is one of their criteria for admitting somebody into the United States. The age of the offence is not relevant: you have a criminal record.