I have recently come across an answer on one of Stack Exchange's sites (Skeptics) that was quite surprising to me. I have been a part of the Stack Exchange network for a while, and this is the first time I have ever seen someone actually attempt to threaten Stack Exchange itself!
The question is about whether it is worth it to own a handgun. A visitor saw the post, and made a threat (deleted now, but 10k users can see it) against Stack Exchange. They had posted that they would attempt to get as many people as they could to try to start a DDoS attack against Stack Exchange!
I am going to broadcast this question in all it ridiculousness far and wide and you will be hit with every NRA member in the country and then some. Hope your sever can handle it
Now while I highly doubt that they will be successful, action should still be taken against someone who makes a threat like that. I'm not just talking about a user who makes a threat against Stack Exchange, but also about a user who makes a threat against another user (be that digital, or physical).
The user had just created an account, so removing the answer and banning the account is not necessarily enough. I believe further action should be taken to ban the user's IP address from ever using (and possibly even visiting) any of the Stack Exchange site's again. I am not a moderator, nor do I work for Stack Exchange, so I have no authority to do this myself. However, if there are other users who agree with me, or have other ideas about what should be done to such users, please comment, or provide your own answer.
Edit: I am not asking this because of an individual post, as he was obviously just a troll, and likely, nothing will come of it. I am creating this because I have noticed that Stack Exchange does not have an existing policy on threats. Wikipedia has one, and I think we should too.