Ideally should not be done. But disclosure: I've done it before. And I've done it before because the first 10 minutes of submission seem to be very very important for the life of the submission.

Ideally: it would be awesome if we could hide the entries we've already read from the front page. And these entries are replaced by "new" entries. This would give the new entries a fair chance - and people wouldn't resort to gaming the system.

Also - giving points to people to visit the new page is a good idea.