script checking for duplicate links?

[eternal]

can anyone create a script for duplicate links so when someone posts a link to something and that link was already posted on another message, the user would not be allowed to post the link? thanks

[Joshua Clinard]

That would be nice. Except make it so that is doesn't check for links to threads on the forums. Sometimes mods need to be able to post a link to a thread, when someone posts a duplicate thread. so that person will be able to find the correct thread to post in. Sometimes this happens more than once too.

[eternal]

would this be too difficult to do?