The 'new' page scrolls by so fast that it is pretty hard to keep track of all the links submitted.

That would go a long way towards getting rid of some of the frustration experienced by the 'old hands' here.

Maybe introduce categories, say 'real hacker news' and 'the rest' to begin with ?

Another easy to add feature would be something that checks the intersection between the vocabulary of the 'new' submission with the last 100 or so older submissions, above a certain threshold there could be a 'your submission is similar to 'x' message, are you sure you want to submit' confirmation.

Compliments to RiderOfGiraffes for spotting all those dupes btw!