if you're Canadian, "enforceable in a court of law" requires real conformity with the law and not the discussed scams. that's why us companies almost never try to enforce extended copyright in Canada.
but many companies claim copyright anyway . I was trying to photocopy some lute tablature from a british publication , published in 1950, of music writen in 1600, and staples wouldn't do it. one of many examples of applying American law in Canada. and I was taking a class so it fell under the Canadian exception for "educational purposes". so I just did it myself.
we do have a new piece of legislation to bring Canadian law closer to American. another terrible decision by the harper neo conmen.