We don't even know if there were any actual threats. So far all anyone has mentioned is that dude on that stupid web site saying stupid things. Yes, it was a veiled threat, but I don't think anyone was under the impression that he was going to carry it out, because he's a spineless wuss. He was urging others to carry it out. But that kind of stuff happens all the time.
I have to wonder if the network actually got any legitimate threats, or if it was really just that. If a security lockdown happened every time someone said something stupid on the internet, well.......