I thought this would be about the ban a few years ago: Brooms with certain bristles were banned, as it made it "too easy".
From the same paper a few years back: https://www.nytimes.com/2015/11/20/sports/facing-control-iss...
From the same paper a few years back: https://www.nytimes.com/2015/11/20/sports/facing-control-iss...
(I love that the user complaining about curling minutiae has the username "stan_rogers", by the way. Possibly the most Canadian thing ever.)
(I can sing all of his stuff as a party piece, but I had the name a long time before he became famous, and Stan is a really common name in my family going back many generations. Probably related if you go all Mormon on the genealogy, but that's more effort than fun.)