Another suggestion if it hasn't already been suggested before, is that the URLs provided should be checked with previous news.ycombinator.com submissions and if

Another suggestion if it hasn't already been suggested before, is that the URLs provided should be checked with previous news.ycombinator.com submissions and if there is a match, the website should bug you about it. i.e.: person A: submit: www.xyz.com/article1 -- OK person B: submit: www.xyz.com/article1 -- <msword>"Are you /sure/ you want to submit this article? personA did this <date> ago."</msword> person C: submit: www.xyz.com/article 2 -- Bug them even for this, just so people can get the idea that its in good form to stay fresh and not have 2 or 3 URLs in the main news feed that will be all from the same website. This isn't reddit or digg. This shouldn't be "oh I found this website slightly interesting and so i'll put up 3 or 4 submissions to specific articles."