That is a good idea!
But how to not anger new people if they want to link to something that they have a question about or a link that isn't spam might be difficult. Maybe they could have a option that if they wanted to post with a link they would have to submit that post and a moderator or other trusted members set up could determine if it was spam and if it is then not post it and if not then post it. But I don't know what the chances of someone with those privilages to be here within a few minutes of them wating to post and it would take some work o get that set up. Oh well, just something to get everybody rolling....