It’s totally a thing! I never believed in it until I started a huge blanket in celebration of our anniversary but never got to finish it.
Haven’t heard of it outside of the internet tbh. Also, I feel like it’s more a running gag than an actual belief. We can probably all agree that a breakup happening every 100 sweaters or so is not exactly a curse.
The government doesn’t want you to know that but actually the Queen didn’t die, she just decided it’s finally time to retire and moved where she figured no one would look for her. After the unpaid intern accidentally leaked the information - hence the rooms name on the map - that fact is still denied, which just makes it more suspicious.