Took a look at McDonalds and their Arch has at least 5 different trademarks; and one of the arches is connected to a slogan (service mark). McDonald's has been busy branding and developing its trademark conglomeration for about 50 years now. They even have a trademark on Ronald Mc the clown. The actively and aggressively police their trademark rights. Can you blame them.
But they can not stop someone from using their name "as a trade name under S.20 (1)(a) of the Trade-marks Act" Read that in an article & do not understand it one bit. Because the article also stated "Mac or Mc can not be used for any food service." Maybe money does talk.