When do you delete a site that's 404

[ladydesigner]

If I know the submitter and he/she is in good standing with my link list, I send them an email before deleting their links (that turn up 404). Usually it's a hosting issue and is fixed soon. If it's a site from a little known submitter or they've only got a few sites listed with me, I go ahead and remove them when they come up 404. Hope that helps.