This wasn't an email, but it's the DA equivalent:
"
EMERGENCY, VIRUS ON THE LOOSE!
If someone by the name of Alfred Hundana (dragon_heart620) wants to add you to their buddy list, don't accept it. It's a virus. Please tell everyone on your lists, because if someone on your list addes them, you may get the virus too. This virus is a hard-drive killer. We need to find out who is using this account.
Very sorry for the inconvenience.
(To send to everyone on your list, just click the drop-down menu in the Recipient field and click 'Unsorted' or whatever the group name for you buddy list is."
If you get something like this, ignore it. It's spam, and it's fake. The "person" who actually signed up on DA with a similar username's already banned.
I almost sent it to all who watch me, but I wanted to try blocking first. No matter what I did, it wouldn't work, so I searched the person's username, and all that came up was hate pics and a "It's fake" pic. I clicked on that and in the description was a news article explaining that it's fake and all that. It's now one of my faved news.
But it still scared me a bit when I believed. XD