Maybe an URL checker would implicitly discourage reposts by warning about them.
If the URL checker were to present itself as a helpful aid for reposts ("You might want to use this title like the other 3 posters have used: X") it might avoid that result.
If the URL checker were to present itself as a helpful aid for reposts ("You might want to use this title like the other 3 posters have used: X") it might avoid that result.