Often times they are phishing links, and the phished accounts are used to send similar messages to more people. Achronos told me that I should just secure myself. They ban the accounts as much as they can, but they still make new accounts and flood the PM boxes. He just said the block button is the best resource I have, and that they do try to stop the Phishing and spam, but in the end, they just keep coming, and Bungie won't give up, but it's best just to be wise and not copy/paste their lazy links and block these accounts. And the What's an Achronos post was the best I've ever seen on the forums, and therefore got screenshotted. Seriously, that should be a new title for the homepage. I lol'd so freaking hard.