In 'The Phantom of the Opera', the Phantom's love for Christine was a cursed one. His disfigured face and his dark, possessive love made it impossible for them to have a normal relationship. Christine was torn between the Phantom and Raoul, and the whole situation was filled with mystery, danger and a sense of doom.
One example could be a story about a haunted doll that comes to life at night and torments the children in their sleep. Another might be a tale of a dark forest where strange creatures lurk and anyone who enters is never seen again. There could also be a story of a cursed mirror that reflects a person's worst fears instead of their image.
In 'Harry Potter', the Horcruxes are a form of cursed items. Voldemort split his soul and placed parts of it in various objects. These Horcruxes were protected by dark magic and brought great harm to those who got too close. For instance, the locket Horcrux had a negative influence on the wearer, making them moody and irritable.
Cursed love stories can also end with the destruction of the lovers themselves. In 'Romeo and Juliet', they both took their own lives rather than live without each other. Their love was so strong but the curse of their families' enmity was too much to overcome. And in some cases, like 'Wuthering Heights', the curse extends beyond the lovers' lifetimes and affects future generations with pain and suffering.
One example could be 'A Series of Unfortunate Events'. The Baudelaire orphans face one misfortune after another, from the death of their parents to being pursued by the villainous Count Olaf. It has a rather 'cursed' feel as the children are constantly in danger and bad things keep happening to them.
One example could be 'Wuthering Heights'. The relationship between Heathcliff and Catherine is rather cursed. Their love is filled with jealousy, revenge, and a sense of being doomed from the start. Heathcliff's dark and brooding nature, along with the social class differences and misunderstandings, make their love story more of a tortured and cursed one.
Popular examples might be hard to define since 'cursed' can mean different things to different readers. But perhaps a fanfiction where the Sorting Hat starts making wrong decisions on purpose, leading to chaos among the houses. This would be a cursed take on an important element of the Harry Potter world. Another could be a story where the Philosopher's Stone has a curse that not only affects those who seek it but also starts to corrupt the whole magical world with its dark influence.
Yes, there are some that are known for their extreme and off - putting content. For example, those that completely distort the relationships between characters in a very inappropriate way. They might turn a healthy friendship in RWBY into something unrecognizable and uncomfortable.
It could be considered cursed because people who enter it often go missing. Maybe there are some dangerous and mysterious creatures living in there that prey on humans.
One example could be a fanfic in a superhero universe where a hero is paired with a villain in a very strange and dark relationship. It's cursed because it goes against the typical good - vs - evil dynamic, but sacred to some fans who like exploring the complex emotions between the two characters. Another example might be a fanfic in a fantasy world where a minor, often overlooked character is given a central and very unorthodox role. It's cursed as it's not the normal way the story is told, but sacred for those who love that character.
You could look at 'Pride and Prejudice'. The relationship between Elizabeth and Mr. Darcy develops in a heartwarming way. It shows how misunderstandings can be overcome and true love can blossom.